Charles Ellicott Commentary Psalms 119:9

"Wherewith shall a young man cleanse his way? By taking heed [thereto] according to thy word." — Psalms 119:9 (ASV)

BETH.

Wherewithal. —There can be little question that the right rendering of this verse is By what means can a young man purify his way, so as to keep it according to Your word? but from Joshua 6:18 we might render keep himself. The English rendering, which follows the Septuagint and Vulgate, is, of course, possible, but the other is more natural and more in accordance with the general drift of the psalm.

The answer is supposed, or rather left to be inferred, from the whole tenor of the psalm. The psalm implies that men, and especially young men, whose passions and temptations are strong in proportion to their inexperience, can do nothing on their own but are dependent on the grace of God. The omission of a direct answer rather strengthens than impairs the impression on the reader.

We must not, from the mention of youth, conclude that this psalm was written in that period of life. Perhaps, on the contrary, it is one who, like Browning’s Rabbi ben Ezra, while seeking how best to spend old age, looks back on youth, not with remonstrance against its follies, but with the satisfaction that even then he aimed at the best he knew.