Holding faith, and a good conscience; which some having put away concerning faith have made shipwreck:

Having faith and a good conscience, which some rejecting have made shipwreck concerning the faith.

maintaining faith and a good conscience; which last some, having put away, have made shipwreck as to faith;

having faith and a good conscience, which certain having thrust away, concerning the faith did make shipwreck,

holding fast to faith and a clear conscience, which some have cast aside and have made shipwreck of their faith.

Keeping faith, and being conscious of well-doing; for some, by not doing these things, have gone wrong in relation to the faith:

holding to faith and good conscience, against those who, by rejecting these things, have made a shipwreck of the faith.

with faith, and with a clear conscience; and it is because they have thrust this aside, that, as regards the faith, some have wrecked their lives.

Having faith and a good conscience I understand the word faith to be a general term, denoting sound doctrine. In the same sense he afterwards speaks of "the mystery of faith." (1-Timothy 3:9.) And, indeed, the chief things demanded from a teacher are these two: -- that he shall hold by the pure truth of the gospel; and next, that he shall administer it with a good conscience and holiest zeal. Where these are found, all the others will follow of their own accord. From which some having turned aside concerning faith He shows how necessary it is that faith be accompanied by a good conscience; because, on the other hand, the punishment of a bad conscience is turning aside from the path of duty. They who do not serve God with a sincere and a perfect heart, but give a loose rein to wicked dispositions, even though at first they had a sound understanding, come to lose it altogether. This passage ought to be carefully observed. We know that the treasure of sound doctrine is invaluable, and therefore there is nothing that we ought to dread more than to have it taken from us. But Paul here informs us, that there is only one way of keeping it safe; and that is, to secure it by the locks and bars of a good conscience. This is what we experience every day; for how comes it that there are so many who, laying aside the gospel, rush into wicked sects, or become involved in monstrous errors? It is because, by this kind of blindness, God punishes hypocrisy; as, on the other hand, a genuine fear of God gives strength for perseverance. Hence we may learn two lessons. First, Teachers and ministers of the gospel, and, through them all the churches are taught with what horror they ought to regard a hypocritical and deceitful profession of true doctrine, when they learn that it is so severely punished. Secondly, this passage removes the offense by which so many persons are greatly distressed, when they perceive that some, who formerly professed their attachment to Christ and to the gospel, not only fall back into their former superstitions but (which is far worse) are bewildered and captivated by monstrous errors. For by such examples, God openly supports the majesty of the gospel, and openly shows that he cannot at all endure the profanation of it. And this is what experience has taught us in every age. All the errors that have existed in the Christian Church from the beginning, proceeded from this source, that in some persons, ambition, and in others, covetousness, extinguished the true fear of God. A bad conscience is, therefore, the mother of all heresies; and we see that a vast number of persons, who had not sincerely and honestly embraced the faith, are hurried along, like brute beasts, into the reveries of the Epicureans, so that their hypocrisy is exposed. And not only so, but contempt of God is universally prevalent, and the licentious and disgraceful lives of almost all ranks show that there is either none at all, or the smallest possible potion of integrity in the world; so that there is very great reason to fear lest the light which had been kindled may be speedily extinguished, and God may leave the pure understanding of the gospel to be possessed by very few. Have made shipwreck: The metaphor taken from shipwreck is highly appropriate; for it suggests to us, that, if we wish to arrive safely at the harbor, our course must be guided by a good conscience, otherwise there is danger of "shipwreck;" that is, there is danger lest faith be sunk by a bad conscience, as by a whirlpool in a stormy sea. [1]

Footnotes

1 - "What is human life, and what is the whole of its course? A navigation. Not only are we travelers, as the Scripture tells us, (1-Peter 2:11,) but we have no solidity. They who travel by land, either on foot or on horseback, have still their sure and firm road; but in the world, instead of being on foot or on horseback, we must be, as it were, on a sea, and we have no solid footing. We are like people who are in a boat, and who are always within half a foot of their death; and the boat is a sort of grave, because they see the water all around ready to swallow them up. Thus is it with us, while we live here below. For, on the one hand, there is the frailty that is in us, which is more fluid than water; and then all that surrounds us is like water, which flows on all sides, while at every minute winds, and storms. and tempests arise. Let us therefore learn that our life is but a kind of navigation, which we perform by water, and that we are, at the same time, exposed to many winds and storms. And if it be so, what shall become of us when we have not a good boat or a good pilot?" -- Fr. Ser.

Holding faith - Fidelity to the cause in which you are enlisted - as a good soldier should do. This does not mean, as it seems to me, that Timothy should hold to the system of doctrines revealed in the gospel, but that he should have that fidelity which a good soldier should have. He should not betray his trust. He should adhere to the cause of his master with unwavering steadfastness. This would include, of course, a belief of the truth, but this is not the leading idea in the phrase.
And a good conscience - see the notes, Acts 23:1. A good conscience, as well as fidelity, is necessary in the service of the Redeemer. A good conscience is that which is well informed in regard to what is right, and where its dictates are honestly followed.
Which some having put away - That is, which good conscience some have put from them, or in other words, have not followed its dictates. The truth thus taught is, that people make shipwreck of their faith by not keeping a good conscience. They love sin. They follow the leadings of passion. They choose to indulge in carnal propensities. As a matter of course, they must, if they will do this, reject and renounce the gospel. People become infidels because they wish to indulge in sin. No man can be a sensualist, and yet love that gospel which enjoins purity of life. If people would keep a good conscience, the way to a steady belief in the gospel would be easy. If people will not, they must expect sooner or later to be landed in infidelity.
Concerning faith - In respect to the whole subject of faith. They are unfaithful to God, and they reject the whole system of the gospel. "Faith" is sometimes used to denote the gospel - as faith is the principal thing in the gospel.
Have made shipwreck - There is an entire destruction of faith - as a ship is wholly ruined that strikes on a rock and sinks.

Holding faith - All the truths of the Christian religion, firmly believing them, and fervently proclaiming them to others.
And a good conscience - So holding the truth as to live according to its dictates, that a good conscience may be ever preserved. As the apostle had just spoken of the Christian's warfare, so he here refers to the Christian armor, especially to the shield and breastplate; the shield of faith, and the breastplate of righteousness. See on Ephesians 6:13, etc., (note), and 1-Thessalonians 5:8 (note).
Which some having put away - Απωσαμενοι· Having thrust away; as a fool-hardy soldier might his shield and his breastplate, or a mad sailor his pilot, helm, and compass.
Concerning faith - The great truths of the Christian religion.
Have made shipwreck - Being without the faith, that only infallible system of truth; and a good conscience, that skillful pilot, that steady and commanding helm, that faithful and invariable loadstone; have been driven to and fro by every wind of doctrine, and, getting among shoals, quicksands, and rocks, have been shipwrecked and ingulfed.

Holding (m) faith, and a good conscience; (16) which some having put away concerning faith have made shipwreck:
(m) Wholesome and sound doctrine.
(16) Whoever does not keep a good conscience, loses also by little and little, the gift of understanding. And this he proves by two most lamentable examples.

Holding faith, and a good conscience..... By "faith" is meant, not the grace of faith, but the doctrine of faith, a sense in which it is often used in this epistle; see 1-Timothy 3:9 and the "holding" of it does not intend a mere profession of it, and a retaining of that without wavering, which is to be done by all believers; but a holding it forth in the ministry of the word, in opposition to a concealing or dropping it, or any part of it; and a holding it fast, without wavering, and in opposition to a departure from it or any cowardice about it and against all posers: to which must be added, a good conscience; the conscience is not naturally good, but is defiled by sin; and that is only good, which is sprinkled by the blood of Christ, and thereby purged from dead works; the effect of which is an holy, upright, and becoming conversation; and which seems to be chiefly intended here, and particularly the upright conduct and behaviour of the ministers of the Gospel, in the faithful discharge of their work and office: see 2-Corinthians 1:12.
Which some having put away; that is, a good conscience; and which does not suppose that they once had one, since that may be put away which was never had: the Jews, who blasphemed and contradicted, and never received the word of God, are said to put it from them, Acts 13:46 where the same word is used as here; and signifies to refuse or reject anything with detestation and contempt: these men always had an abhorrence to a good conscience among men, and to a good life and conversation, the evidence of it; and at length threw off the mask, and dropped the faith they professed, as being contrary to their evil conscience: though admitting it does suppose they once had a good conscience, it must be understood not of a conscience cleansed by the blood of Christ, but of a good conscience in external show only, or in comparison of what they afterwards appeared to have: and, besides, some men, destitute of the grace of God, may have a good conscience in some sense, or with respect to some particular facts, or to their general conduct and behaviour among men, as the Apostle Paul had while unregenerate, Acts 23:1 and which being acted against, or lost, is no instance of falling from the true grace of God, which this passage is sometimes produced in proof of:
concerning faith have made shipwreck; which designs not the grace, but the doctrine of faith, as before observed, which men may profess, and fall off from, and entirely drop and lose. Though supposing faith as a grace is meant, the phrase, "have made shipwreck of it", is not strong enough to prove the total and final falling away of true believers, could such be thought to be here meant; since persons may be shipwrecked, and not lost, the Apostle Paul was thrice shipwrecked, and each time saved; besides, as there is a true and unfeigned, so there is a feigned and counterfeit faith, which may be in persons who have no true grace, and may be shipwrecked, so as to be lost.

Holding--Keeping hold of "faith" and "good conscience" (1-Timothy 1:5); not "putting the latter away" as "some." Faith is like a very precious liquor; a good conscience is the clean, pure glass that contains it [BENGEL]. The loss of good conscience entails the shipwreck of faith. Consciousness of sin (unrepented of and forgiven) kills the germ of faith in man [WIESINGER].
which--Greek singular, namely, "good conscience," not "faith" also; however, the result of putting away good conscience is, one loses faith also.
put away--a wilful act. They thrust it from them as a troublesome monitor. It reluctantly withdraws, extruded by force, when its owner is tired of its importunity, and is resolved to retain his sin at the cost of losing it. One cannot be on friendly terms with it and with sin at one and the same time.
made shipwreck--"with respect to THE faith." Faith is the vessel in which they had professedly embarked, of which "good conscience" is the anchor. The ancient Church often used this image, comparing the course of faith to navigation. The Greek does not imply that one having once had faith makes shipwreck of it, but that they who put away good conscience "make shipwreck with respect to THE faith."

Holding fast faith - Which is as a most precious liquor. And a good conscience - Which is as a clean glass. Which - Namely, a good conscience. Some having thrust away - It goes away unwillingly it always says, "Do not hurt me." And they who retain this do not make shipwreck of their faith. Indeed, none can make shipwreck of faith who never had it. These, therefore, were once true believers: yet they fell not only foully, but finally; for ships once wrecked cannot be afterwards saved.