Charles H. Spurgeon on Psalms 111:10

A good understanding have all they that do, etc. So much a man knoweth in true account, as he doth; hence understanding is here ascribed to the will; so Job 28:28. Some render it good success. —John Trapp.

Verse 10 (last clause). The praise of it endures for ever; or as other translations, his praise; referring it either to God, or else to the man who fears God. Some divines ascribe this praise to God alone, because tehilla properly signifieth only that kind of praise which is due to God; and so they make this clause to contain both a precept and a promise. Precept, exhorting us to praise God with all our heart, both in the secret assemblies of the faithful and in the public congregation. And lest any man in executing this office should be discouraged, the prophet addeth a promise, "God's praise doth endure for ever"; as if he should have said, "The Lord is King, be the people never so impatient; the Lord is God, albeit the Gentiles furiously rage together, and the Jews imagine a vain thing; the kings of the earth stand up, and the rulers combine themselves against him, "Ps 99:1 18:31 2:1. He that dwelleth in heaven hath all his enemies in derision, and makes them all his footstool; his power is for ever, and so consequently his praise shall endure for ever; in the militant church, unto the world's end; in the triumphant, world without end. Most interpreters have referred this unto the good man who fears the Lord, yet diversely. S. Augustine expounds it thus, "his praise, "that is, his praising of the Lord, "shall endure for ever, "because he shall be one of them of whom it is said (Ps 84:4) Blessed are they that dwell in thy house: they will be still praising thee. Others understand by "his praise" the commendation of the good man, both in the life present and in that which is to come, for his righteousness shall be had in an everlasting remembrance. Ps 112:6 —John Boys.

Verse 10 (second clause). Where the fear of the Lord rules in the heart, there will be a constant conscientious care to keep his commandments: not to talk them, but to do them; and such have a good understanding, i.e., First, They are well understood, their obedience is graciously accepted as a plain indication of their mind, that they do indeed fear God. Secondly, They understand well.

1. It is a sign they do understand well: the most obedient are accepted as the most intelligent. They are wise that make God's law their rule, and are in everything ruled by it.

2. It is the way to understand better. "A good understanding are they to all that do them"; i.e., the fear of the Lord, and the laws of God give men a good understanding, and are able to make them wise unto salvation. —Condensed from Matthew Henry.