Augustine of Hippo

"The steps of a good man are ordered by the Lord; and he delighteth in His way." That man may himself "delight in the Lord's way," his steps are ordered by the Lord Himself. For if the Lord did not order the steps of man, so crooked are they naturally, that they would always be going through crooked paths, and by pursuing crooked ways, would be unable to return again. He however came, and called us, and redeemed us, and shed His blood; He hath given this ransom; He hath done this good, and suffered these evils. …

ON THE PSALMS - Psalm 37 ↗

Ambrose of Milan

The steps of a man are established by the Lord. The Greek word διαβήματα means 'steps' or 'transitions'. And therefore it is said to you: If you pass through water, rivers will not stop you (Isaiah 43:2). Therefore, cross over, do not hesitate; like a good traveler, when he comes to a sign on the road, he does not stop, but passes through; and you are on a journey, as long as you are in this course. If Paul had stopped, he would not have completed his race. …

Commentaries on the Twelve Davidic Psalms ↗

Thomas Aquinas

Then when he says, "Before," he shows the fruitfulness of the good with regard to works. In works, two things are shown. First, their prosperity. Second, their recovery, at "When he falls." But because prosperity comes from God's election, first it is shown that it comes from God who loves. …

Exposition on the Psalms of David ↗