How shall a young man cleanse his way? by taking heed thereto according to your word.
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Augustine of Hippo
9. "Wherewithal shall a young man correct his way? even by keeping Thy words" (ver. 9). He questioneth himself, and answereth himself. "Wherewithal?" So far it is a question: next cometh the answer, "even by keeping Thy words." But in this place the keeping of the words of God, must be understood as the obeying His commandments in deed: for they are kept in memory in vain, if they are not kept in life also. But what is meant by "young man" here? For he might have said, wherewithal shall any one (homo) correct his way? or, wherewithal shall a man (vir) correct his way? which is usually put by the Scriptures in such a way, that the whole human race is understood. ...But in this passage he saith neither any one, nor a man, but, "a young man." Is then an old man to be despaired of? or doth an old man correct his way by any other means than by ruling himself after God's word? Or is it perhaps an admonition at what age we ought chiefly to correct our way; according to what is elsewhere writt...
Correct. Symmachus, "illustrate. "(Calmet)
The observance of the law is the only method to preserve innocence, or to regain it. (Haydock)
The Holy Spirit gives this direction to youth, and to all who are exposed to the dangers of pleasure, (Worthington) as David might do to his son, 2 Kings ii. 3. (Berthier)
In the same sense as we pray, Lead us not into temptation.