Here is, 1. A weighty question asked. By what means may the next generation be made better than this? Wherewithal shall a young man cleanse his way? Cleansing implies that it is polluted. Besides the original corruption we all brought into the world with us (from which we are not cleansed unto this day), there are many particular sins which young people are subject to, by which they defile their way, youthful lusts (Ti2 2:22); these render their way offensive to God and disgraceful to themselves. Young men are concerned to cleanse their way - to get their hearts renewed and their lives reformed, to make clean, and keep clean, from the corruption that is in the world through lust, that they may have both a good conscience and a good name. Few young people do themselves enquire by what means they may recover and preserve their purity; and therefore David asks the question for them. 2. A satisfactory answer given to this question. Young men may effectually cleanse their way by taking heed thereto according to the word of God; and it is the honour of the word of God that it has such power and is of such use both to particular persons and to communities, whose happiness lies much in the virtue of their youth. (1.) Young men must make the word of God their rule, must acquaint themselves with it and resolve to conform themselves to it; that will do more towards the cleansing of young men that the laws of princes or the morals of philosophers. (2.) They must carefully apply that rule and make use of it; they must take heed to their way, must examine it by the word of God, as a touchstone and standard, must rectify what is amiss in it by that regulator and steer by that chart and compass. God's word will not do without our watchfulness, and a constant regard both to it and to our way, that we may compare them together. The ruin of young men is either living at large (or by no rule at all) or choosing to themselves false rules: let them ponder the path of their feet, and walk by scripture-rules; so their way shall be clean, and they shall have the comfort and credit of it here and for ever.

With my whole heart have I sought thee,.... Not himself, his own honour and applause, as formal worshippers and self-righteous persons do; but the Lord and his glory, his face, his presence, and communion with him, his grace, and fresh supplies of it, to help in time of need; his doctrine, as the Targum; and to know more of it, and of him, and of his mind and will; and this he did in the most sincere manner, with all his heart and soul. The character of the good man, in Psa 119:2; the psalmist applies to himself; see Isa 26:9; and uses it as an argument to obtain the following request:

O let me not wander from thy commandments; the way of them. Good men are apt to go astray, as David, Psa 119:176; their hearts, their affections, and their feet, wander from, the way of their duty: there are many things which lead them aside, and cause them to turn to the right hand or the left, at least solicit them to do so; as a corrupt nature, an evil heart, a body of sin and death, the snares of the world, and the temptations of Satan; and, what is worst of all, when God leaves them to themselves, withdraws the influences of his grace, and brings them into such circumstances as expose them to going astray, which the psalmist here deprecates; "suffer me not to wander", but uphold my goings in thy ways; preserve me by thy grace, and keep me by thy power; hold me by thy right hand, and guide and direct me. Or, "cause me not to wander" (q) &c. a like petition to those in Psa 141:3, Mat 6:13; with which last Kimchi compares these words.

(q) "ne errare facias me", Pagninus, Montanus.