Charles Ellicott Commentary Psalms 111:10

"The fear of Jehovah is the beginning of wisdom; A good understanding have all they that do [his commandments]: His praise endureth for ever." — Psalms 111:10 (ASV)

A good understanding ... —Better, a good estimation have all those who do them. The parallelism here, along with the context of Proverbs 3:4, supports this rendering against that of the margin, “a good success.” Not only is piety the beginning of wisdom, but righteousness wins good esteem. For by his praise we must certainly understand the praise of the good man.