Adam Clarke on Psalms 73:21

Thus may heart was grieved - The different views which I got of this subject quite confounded me; I was equally astonished at their sudden overthrow and my own ignorance. I felt as if I were a beast in stupidity. I permitted my mind to be wholly occupied with sensible things, like the beasts that perish and did not look into a future state; nor did I consider, nor submit to, the wise designs of an unerring Providence.