15 And that from (thy) childhood This was also no ordinary addition, that he had been accustomed, from his infancy, to the reading of the Scripture; for this long habit may make a man much more strongly fortified against every kind of deception. It was therefore a judicious caution observed in ancient times, that those who were intended for the ministry of the word should be instructed, from their infancy, in the solid doctrine of godliness, that, when they came to the performance of their office, they might not be untried apprentices. And it ought to be reckoned a remarkable instance of the kindness of God, if any person, from his earliest years, has thus acquired a knowledge of the Scriptures.
Which are able to make thee wise unto salvation It is a very high commendation of the Holy Scriptures, that we must not seek anywhere else the wisdom which is sufficient for salvation; as the next verse also expresses more fully. But he states, at the same time, what we ought to seek in the Scripture; for the false prophets also make use of it as a pretext; and therefore, in order that it may be useful to us for salvation, it is necessary to understand the right use of it.
Through faith, which is in Christ Jesus What if any one give his whole attention to curious questions? What if he adhere to the mere letter of the law, and do not seek Christ? What if he pervert the natural meaning by inventions that are foreign to it? For this reason he directs us to the faith of Christ as the design, and therefore as the sum, of the Scriptures; for on faith depends also what immediately follows.