Charles H. Spurgeon on Psalms 19:7

"Making wise the simple." The apostle Paul, in Ephesians 1:8, expresseth conversion, and the whole work inherently wrought in us, by the making of a man wise. It is usual in the Scriptures, and you may ofttimes meet with it; "converting the soul," "making wise the simple." The beginning of conversion, and so all along, the increase of all grace to the end, is expressed by wisdom entering into a man's heart, "If wisdom enter into thy heart," and so goes on to do more and more; not unto thy head only —a man may have all that, and be a fool in the end, but when it entereth into the heart, and draws all the affections after it, and along with it, "when knowledge is pleasant to thy soul," then a man is converted; when God breaks open a man's heart, and makes wisdom fall in, enter in, and make a man wise. —Thomas Goodwin.