That thy trust may be in the Lord,.... By means of the words of the wise, or doctrines of the Gospel, faith in Christ is first had; men are directed and encouraged hereby to believe in him; and by the same means faith is increased, confirmed, and established. This is the end of penning the Scriptures, and of the Gospel ministry, as follows: I have made known to thee this day, even to thee; the said words and doctrines in the ministry of the word, by the Spirit of wisdom and revelation in the knowledge of them; giving not only a notional, but a spiritual and experimental knowledge of them. The Lord has particular persons to whom he will make known these things in a saving way; it is "to thee, even to thee"; and to everyone whom God has chosen, and Christ has redeemed: and he has particular times and seasons for it, "this day"; which is a time of life and love; when darkness is removed, and the light of grace shines, and makes it day; and may respect the whole Gospel dispensation, which is the accepted time and day of salvation.