Psalms 19:7

The law of the LORD [is] perfect, converting the soul: the testimony of the LORD [is] sure, making wise the simple.

Ver. 7. The law of the Lord is perfect] Or, doctrine; the whole word of God, commonly distinguished into law and gospel, is perfect, immaculate, sincere, entire, complete. If Cicero dared to say, that the law of the twelve tables in Rome did exceed all the libraries of philosophers, both in weight of authority and fruitfulness of matter, how much rather is this true of God's law! saith a learned writer. Nothing may be added to it without marring it, Proverbs 30:6. Note this against Jewish, Popish, and Turkish traditions and additions; as also against anti-scripturists, and who at first rejected all books but the Bible, and after that grew so wise as to be religious enough without that also. And last of all they came to blaspheme that blessed book, as a dead letter, and a beggarly element, &c.; when as the apostle telleth us, that all Scripture is pure, precious, and profitable for doctrine, for reproof, &c., that the man of God may be perfect, &c., 2 Timothy 3:16,17. Here in this and the two following verses it is easy to observe - 1. That every one of them are in the Hebrew written with ten words. 2. That here is a sixfold commendation of God's holy word. (l.) By the several names thereunto given, law, testimony, statutes, &c (2.) By the nature, perfect, sure, right, &c. (3.) By the effects, converting the soul, making wise the simple, &c.

Converting the soul] This no doctrine besides can do. Integra est doctrina, ae proinde animos redintegrat. Plato went thrice to Sicily to convert Dionysius the tyrant, but could not. Ambrose saith well of Polemo, who of a drunkard, by hearing Xenocrates, became a philosopher, Si resipuit a vino, fuit semper tamen temulentus sacrilegio, If he gave over his drunkenness, yet he continued still drunk with superstition. Seneca the philosopher wrote a book (now lost) against superstitions, but yet lived and died in them; Colebat quod reprohendebat, agebat quod arguebat, quod culpabat adorabat, saith Austin of him, he exercised what he condemned, and would not leave what he did so utterly dislike. But the word works a transmentation, an entire change of the mind and manners, a new creation, 2 Corinthians 5:17 .

The testimony of the Lord is sure] These words are faithful and true, Revelation 22:6, they are all in righteousness, neither is there in them anything perverse or froward, Proverbs 8:8. Testimonies they are called, 1. Because they testify (as a record) to all ages what the will of the Lord is, John 5:39 John 5:2. They were given with great contestation, and pressing of all men to keep them. 3. They will be a witness against all such as do not. The gospel also is called a testimony, 1 Corinthians 2:1 2Th 1:10 Isaiah 8:20 .

Making wise the simple] That is, the humble, teachable, and such as are not puffed up with a conceit of their own wisdom, 1 Corinthians 7:18, the very entrance into God's word giveth light, it giveth understanding to the simple, or to the persuadable, Psalms 119:130. It is reasonable milk, 1 Peter 2:2 .