3:14-17 Those who would learn the things of God, and be assured of them, must know the Holy Scriptures, for they are the Divine revelation. The age of children is the age to learn; and those who would get true learning, must get it out of the Scriptures. They must not lie by us neglected, seldom or never looked into. The Bible is a sure guide to eternal life. The prophets and apostles did not speak from themselves, but delivered what they received of God, 2Pe 1:21. It is profitable for all purposes of the Christian life. It is of use to all, for all need to be taught, corrected, and reproved. There is something in the Scriptures suitable for every case. Oh that we may love our Bibles more, and keep closer to them! then shall we find benefit, and at last gain the happiness therein promised by faith in our Lord Jesus Christ, who is the main subject of both Testaments. We best oppose error by promoting a solid knowledge of the word of truth; and the greatest kindness we can do to children, is to make them early to know the Bible.
15. from a child—literally, "from an infant." The tender age of the first dawn of reason is that wherein the most lasting impressions of faith may be made.
holy scriptures—The Old Testament taught by his Jewish mother. An undesigned coincidence with 2Ti 1:5; Ac 16:1-3.
able—in themselves: though through men's own fault they often do not in fact make men savingly alive.
wise unto salvation—that is, wise unto the attainment of salvation. Contrast "folly" (2Ti 3:9). Wise also in extending it to others.
through faith—as the instrument of this wisdom. Each knows divine things only as far as his own experience in himself extends. He who has not faith, has not wisdom or salvation.
which is in—that is, rests on Christ Jesus.