Clement of Alexandria

To sum up, David in the Psalms speaks about obedience: "How shall a young person keep his path straight?" The answer comes immediately: "By keeping your Word with his whole heart." Jeremiah says, "These are the Lord's words: do not follow the paths of the Gentiles."

The Stromata Book 3 ↗

Augustine of Hippo

"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? …

Exposition on Psalm 119 ↗

Ambrose of Milan

Let us listen, then, to the master of precaution: "I said, I will pay attention to my ways"; that is, "I said to myself: in the silent biddings of my thoughts, I have enjoined on myself, that I should pay attention to my ways." Some ways there are that we ought to follow; others as to which we ought to pay attention. We must follow the ways of the Lord and pay attention to our own ways, lest they lead us into sin. One can pay attention if one is not hasty in speaking. …

On the Duties of the Clergy 1.2.7 ↗