Psalms 119:9

The whole verse may be read as a question; for, by taking heed--is better, "for" taking heed, that is, so as to do it. The answer is implied, and inferable from Ps 119:5, 10, 18, &c., that is, by God's grace.

"Wherewithal shall a young man cleanse his way?" How shall he become and remain practically holy? He is but a young man, full of hot passions, and poor in knowledge and experience; how shall he get right, and keep right? Never was there a more important question for any man; never was there a fitter time for asking it than at the commencement of life. It is by no means an easy task which the prudent young man sets before him. He wishes to choose a clean way, to be himself clean in it, to cleanse it of any foulness which may arise in the future, and to end by showing a clear course from the first step to the last; but, alas, his way is already unclean by actual sin which he has already committed, and he himself has within his nature a tendency towards that which defileth. Here, then, is the difficulty, first of beginning aright, next of being always able to know and choose the right, and of continuing in the right till perfection is ultimately reached: this is hard for any man, how shall a youth accomplish it? The way, or life, of the man has to be cleansed from the sins of his youth behind him, and kept clear of the sins which temptation will place before him: this is the work, this is the difficulty. No nobler ambition can lie before a youth, none to which he is called by so sure a calling; but none in which greater difficulties can be found. Let him not, however, shrink from the glorious enterprise of living a pure and gracious life; rather let him enquire the way by which all obstacles may be overcome. Let him not think that he knows the road to easy victory, nor dream that he can keep himself by his own wisdom; he will do well to follow the Psalmist, and become an earnest enquirer asking how he may cleanse his way.

A young man cleanse his way - ארח orach, which we translate way here, signifies a track, a rut, such as is made by the wheel of a cart or chariot. A young sinner has no broad beaten path; he has his private ways of offense, his secret pollutions: and how shall he be cleansed from these? how can he be saved from what will destroy mind, body, and soul? Let him hear what follows; the description is from God. 1. He is to consider that his way is impure; and how abominable this must make him appear in the sight of God. 2. He must examine it according to God’s word, and carefully hear what God has said concerning him and it. 3. He must take heed to it, לשמר lishmor, to keep guard, and preserve his way - his general course of life, from all defilement.

Wherewithal - This begins the second portion of the psalm, extending to Psa 119:16, in which all the verses begin with the second letter of the Hebrew alphabet (ב b), indicated in our translation by the word Beth. These names of the letters, inserted for convenience, are no part of the psalm, as it is not so marked in the original. This mode of indicating the divisions of the psalm is special to our version. It is not in the Septuagint, the Latin Vulgate, or the German versions. The word wherewithal means “by what” (Hebrew); that is, What means shall a young man adopt by which he may “cleanse his way?” it indicates a state of inquiry. The case supposed is that of a young man pondering the question how he may be saved from the corruptions of his own heart, and escape the temptations to which he is exposed in early years, and lead a pure and upright life. There can be no more important inquiry for one just entering on the journey of life; there can be found nowhere a more just and comprehensive answer than is contained in this single verse. All the precepts of ancient and modern wisdom, all the teachings of pagan morality and religion, and all the results of the experience of mankind, could furnish nothing in addition to what is here suggested. […]