In all things shewing thyself For doctrine will otherwise carry little authority, if its power and majesty do not shine in the life of the bishop, [1] as in a mirror. He wishes, therefore, that the teacher may be a pattern, which his scholars may copy. [2] A pattern of good works in doctrine, uprightness, gravity In the original Greek the style is here involved and obscure, and this creates ambiguity. First, he makes use of the words in doctrine, and then adds, in the accusative case, integrity, gravity, etc. [3] Without mentioning the interpretations given by others, I shall state that which appears to me to be the most probable. First, I connect these words, of good works in doctrine; for, after having enjoined Titus that, in teaching he shall inculcate the practice of good works, he wishes that good works, which correspond to this doctrine, may be visible in his life; and consequently the preposition in means that they shall be suitable, or shall correspond, to the doctrine. What follows is in no degree obscure; for; in order that he may exhibit a representation of his doctrine in morals, he bids him be "upright and grave."

Footnotes

1 - "En la vie du pasteur." -- "In the life of the pastor."

2 - "As if he had said, that the man who has the office and duty of proclaiming the word of God ought to preach throughout his whole life, since God has chosen him to that condition; when it shall be seen how he governs, when it is found that it is an approbation of the doctrine which he teaches, and that he profits and edifies not only by the mouth, showing what ought to be done, but likewise by his example, when it shall be known that he speaks in sincerity, and not in hypocrisy, that he may be edified by it. And would to God that this were duly observed; for the truth of God would be received with greater reverence than it is. But however that may be, we shall not be held excused, since God wishes to make use of us so as to regulate others, and to direct our life in such a manner that, when they shall follow as with one accord, we may strive to honor God, and give no occasion to despise the sacred word, since God has made us instruments, and wishes that his doctrine should be received from us, as if he spoke in his own person." -- Fr. Ser.

3 - "At en tho didaskalia adiaphthorian repeat parechomenos in the sense endeiknumenos." -- Bloomfield.

In all things showing thyself a pattern of good works - Not merely teaching others, but showing them by example how they ought to live. On the word rendered "pattern" (τύπον tupon, type), see the Hebrews 9:5 note; 1-Corinthians 10:6 note; Philippians 3:17 note.
In doctrine - In your manner of teaching; notes, 1-Timothy 4:16.
Showing uncorruptness - The word here used does not occur elsewhere in the New Testament. It means, here, the same as purity - that which is not erroneous, and which does not tend to corrupt or vitiate the morals of others, or to endanger their salvation. Everything in his teaching was to be such as to make men purer and better.
Gravity - See this word explained in the notes at 1-Timothy 2:2, where it is rendered "honesty;" compare the notes at 1-Timothy 3:4, where it is rendered "gravity." It does not elsewhere occur; see the use of the adjective, however, in Philippians 4:8; 1-Timothy 3:8, 1-Timothy 3:11; Titus 2:9. The word properly means "venerableness;" then, whatever will insure respect, in character, opinions, deportment. The sense here is, that the manner in which a preacher delivers his message, should be such as to command respect. He should evince good sense, undoubted piety, an acquaintance with his subject, simplicity, seriousness, and earnestness, in his manner.
Sincerity - See this word (ἀφθαρσία aphtharsia) explained in the notes at Ephesians 6:24. It is rendered immortality in Romans 2:7; 2-Timothy 1:10; incorruption, in 1-Corinthians 15:42, 1-Corinthians 15:50, 1-Corinthians 15:53-54; and sincerity, Ephesians 6:24, and in the place before us. It does not elsewhere occur in the New Testament. It means incorruption, incapacity of decay; and, therefore, would be here synonymous with purity. It should be said, however, that it is wanting in many msS, and is rejected in the later editions of the New Testament by Wetstein, Tittman, and Hahn.

In all things showing thyself a pattern - As the apostle had given directions relative to the conduct of old men, Titus 2:2, of old women, Titus 2:3, of young women, Titus 2:4, and of young men, Titus 2:6, the words περι παντα, which we translate in all things, should be rather considered in reference to the above persons, and the behavior required in them: showing thyself a pattern of good works to all these persons - being, in sobriety, gravity, temperance, what thou requirest others to be.
In doctrine showing uncorruptness - Mixing nothing with the truth; taking nothing from it; adding nothing to it; and exhibiting it in all its connection, energy, and fullness.

(3) In all things shewing thyself a pattern of good works: in doctrine [shewing] uncorruptness, (b) gravity, sincerity,
(3) The sixth admonition: that both the pastor's life and doctrine must be sound.
(b) Not such a gravity as may drive men from coming to the minister, but such as may cause them to come in a most reverent and honest way.

In all things showing thyself a pattern of good works,.... It was not enough for Titus, and so neither for any other Gospel minister, to deliver out sound doctrine, and to exhort persons of different ages and sexes to the things which become it, but he should through the whole of his conversation be a pattern of every good work unto them; for they that are the shepherds of the flock, are not only to feed them with knowledge, and with understanding, but to be ensamples to them, as well as they who are under their care ought to walk, as they have them for an example; see 1-Timothy 4:12.
In doctrine, showing uncorruptness, gravity, sincerity; the apostle here either returns again to his advice about doctrine, that it should be delivered out pure and incorrupt, free from error and heresy, and every mixture and invention of man's; and with all gravity of speech and countenance, without levity in expression, and airiness of gesture; and that it be the sincere milk of the word that is given forth, and that with all integrity and uprightness of soul: or else this refers to the life and conversation of the teacher, as answering to his doctrine, and going along with it; and the sense is, in, or with doctrine, along with the doctrine preached, let the conversation be pure and incorrupt, free from the pollutions of the world, and from any governing vice; and let it be attended with gravity in word, gesture, look, and dress; and with all sincerity, faithfulness, and simplicity, in all our dealings, either with the saints, or with the men of the world.

In--with respect to all things.
thyself a pattern--though but a young man thyself. All teaching is useless unless the teacher's example confirm his word.
in doctrine--in thy ministerial teaching (showing) uncorruptness, that is, untainted purity of motive on thy part (compare 2-Corinthians 11:3), so as to be "a pattern" to all. As "gravity," &c., refers to Titus himself, so "uncorruptness"; though, doubtless, uncorruptness of the doctrine will be sure to follow as a consequence of the Christian minister being of simple, uncorrupt integrity himself.
gravity--dignified seriousness in setting forth the truth.
sincerity--omitted in the oldest manuscripts.

Showing thyself a pattern. While exhorting others.
Showing uncorruptness. Sincerity.
Sound speech. Speech of a healthy, moral effect.
He that is of the contrary part. Opposers, whether heathen, Jews, or false teachers.

Showing thyself a pattern - Titus himself was then young. In the doctrine which thou teachest in public: as to matter, uncorruptness; as to the manner of delivering it, seriousness - Weightiness, solemnity.