That the man of God may be perfect. Perfect means here a blameless person, one in whom there is nothing defective; for he asserts absolutely, that the Scripture is sufficient for perfection. Accordingly, he who is not satisfied with Scripture desires to be wiser than is either proper or desirable. But here an objection arises. Seeing that Paul speaks of the Scriptures, which is the name given to the Old Testament, how does he say that it makes a man thoroughly perfect? for, if it be so, what was afterwards added by the apostles may be thought superfluous. I reply, so far as relates to the substance, nothing has been added; for the writings of the apostles contain nothing else than a simple and natural explanation of the Law and the Prophets, together with a manifestation of the things expressed in them. This eulogium, therefore, is not inappropriately bestowed on the Scriptures by Paul; and, seeing that its instruction is now rendered more full and clear by the addition of the Gospel, what can be said but that we ought assuredly to hope that the usefulness, of which Paul speaks, will be much more displayed, if we are willing to make trial and receive it?

That the man of God may be perfect - The object is not merely to convince and to convert him; it is to furnish all the instruction needful for his entire perfection. The idea here is, not that any one is absolutely perfect, but that the Scriptures have laid down the way which leads to perfection, and that, if any one were perfect, he would find in the Scriptures all the instruction which he needed in those circumstances. There is no deficiency in the Bible for man, in any of the situations in which he may be placed in life; and the whole tendency of the book is to make him who will put himself fairly under its instructions, absolutely perfect.
Thoroughly furnished unto all good works - Margin, "perfected." The Greek means, to bring to an end; to make complete. The idea is, that whatever good work the man of God desires to perform, or however perfect he aims to be, he will find no deficiency in the Scriptures, but will find there the most ample instructions that he needs. He can never advance so far, as to become forsaken of his guide. He can never make such progress, as to have gone in advance of the volume of revealed truth, and to be thrown upon his own resources in a region which was not thought of by the Author of the Bible. No new phase of human affairs can appear in which it will not direct him; no new plan of benevolence can be started, for which he will not find principles there to guide him; and he can make no progress in knowledge or holiness, where he will not feel that his holy counsellor is in advance of him still, and that it is capable of conducting him even yet into higher and purer regions. Let us, then, study and prize the Bible. It is a holy and a safe guide. It has conducted millions along the dark and dangerous way of life, and has never led one astray. The human mind, in its investigations of truth, has never gone beyond its teachings; nor has man ever advanced into a region so bright that its light has become dim, or where it has not thrown its beams of glory on still far distant objects. We are often in circumstances in which we feel that we have reached the outer limit of what man can teach us; but we never get into such circumstance in regard to the Word of God.
How precious is the book divine,
By, inspiration given!
Bright as a lamp its doctrines shine.
To guide our souls to heaven.
It sweetly cheers our drooping hearts.
In this dark vale of tears:
Life, light, and joy, it still imparts,
And quells our rising fears.
This lamp, through all the tedious night.
Of life, shall guide our way;
Till we behold the clearer light.
Of an eternal day.

That the man of God - The preacher of righteousness, the minister of the Gospel, the person who derives his commission from God, and always appears as his herald and servant.
May be perfect - Αρτιος· From αρω, to fit or adapt. It properly signifies an integer or whole number in arithmetic, to which nothing needs to be added to make it complete.
Throughly furnished - Εξηρτισμενος· From εξ, intensive, and αρτιος, complete; see above. Not only complete in himself as to his integrity, religious knowledge, faith in Jesus, and love to God and man, but that he should have all those qualifications which are necessary to complete the character, and insure the success of a preacher, of the Gospel. Timothy was to teach, reprove, correct, and instruct others; and was to be to them a pattern of good works.
From what the apostle says here concerning the qualifications of a Christian minister, we may well exclaim: Who is capable of these things? Is it such a person as has not intellect sufficient for a common trade or calling? No. A preacher of the Gospel should be a man of the soundest sense, the most cultivated mind, the most extensive experience, one who is deeply taught of God, and who has deeply studied man; one who has prayed much, read much, and studied much; one who takes up his work as from God, does it as before God, and refers all to the glory of God; one who abides under the inspiration of the Almighty, and who has hidden the word of God in his heart, that he might not sin against him. No minister formed by man can ever be such as is required here. The school of Christ, and that alone, can ever form such a preacher.

That the (e) man of God may be perfect, throughly furnished unto all good works.
(e) The Prophets and expounders of God's will are properly and distinctly called, men of God.

That the man of God may be perfect,.... By the man of God may be meant everyone that in a special relation belongs to God; who is chosen by God the Father, redeemed by the Son, and called by the Spirit; but more especially a minister of the Gospel; for as it was usual to call a prophet under the Old Testament by this name, it seems to be transferred from thence to a minister of the New Testament, see 1-Timothy 6:11 and the design of the Scriptures and the end of writing them are, that both preachers of the word, and hearers of it, might have a perfect knowledge of the will of God; that the former might be a complete minister of the Gospel, and that nothing might be wanting for the information of the latter:
thoroughly furnished unto all good works, or "every good work"; particularly to the work of the ministry, which is a good one; and to every part and branch of it, a thorough furniture for which lies in the holy Scriptures; from whence, as scribes well instructed in the kingdom of heaven, do Gospel ministers bring forth things new and old, both for delight and profit: though this may be also applied to all good works in common, which the Scriptures point unto, give directions about, as well as show where strength is to be had to perform them.

man of God--(See on 1-Timothy 6:11).
perfect, throughly furnished--Greek, "thoroughly perfected," and so "perfect." The man of God is perfectly accoutred out of Scripture for his work, whether he be a minister (compare 2-Timothy 4:2 with 2-Timothy 3:16) or a spiritual layman. No oral tradition is needed to be added.

That the man of God - He that is united to and approved of God. May be perfect - Blameless himself, and throughly furnished - By the scripture, either to teach, reprove, correct, or train up others.