Galates 2:18

For if I build again the things which I destroyed.

I. Teachers are great offenders when good doctrine is joined to bad conversation. Good doctrine destroys the kingdom of darkness, bad doctrine builds it up again.

II. Rulers are transgressors when good counsel which beats down wickedness goes with bad example, which sets it up again.

III. Professors are great sinners when reformed religion and unreformed life are connected, for unreformed life builds again that which Christ hath destroyed. (W. Perkins.)

The sinfulness of Judaistic practices

In repairing to Christ, Peter had virtually pulled down the fabric of the law as the ground of justification (formally did so, under Divine direction, in the house of Cornelius); but in now returning to its observance as a matter of principle, he was again building it up, and in this he proved himself to be a transgressor: but how?

I. Such vacillation, playing fast and loose with the things of God, was a serious moral obliquity.

II. In the retrogression complained of there was involved a departure from the very aim of the law, which was to lead men to Christ. Peter, therefore--

III. Defeated the intention of the law, and acted toward it the part of a transgressor. (Fairbairn)

.

Value of consistency

In one of the older States resided an infidel, the owner of a saw-mill, situated by the side of a highway, over which a large portion of a Christian congregation passed every Sabbath to anti from the church. This infidel, having no regard for the Sabbath, was as busy, and his mill was as noisy, on that holy day as any other. Before long it was observed, however, that a certain time before service the mill would stop, remain silent, and appear to be deserted for a few minutes; when its noise and clatter would recommence and continue till about the close of the service, when for a short time it again ceased. It was soon noticed that one of the deacons of the church passed the mill to the place of worship during the silent interval; and so punctual was he to the hour, that the infidel knew just when to stop the mill, so that it should be silent while the deacon was passing, although he paid no regard to the passing of the others. On being asked why he paid this mark of respect to the deacon, he replied, “The deacon professes just what the rest of you do; but he lives, also, such a life, that it makes me feel bad here (putting his hand upon his heart) to run my mill while he is passing.” (Elon Foster.)