give them one heart and will put a new spirit within them:” and “I will take away the stony heart from their flesh and will give them an heart of flesh that they may walk in Thy statutes and keep My judgments?” What is it that the Lord commands, where He says: “Wash thine heart of iniquity, O Jerusalem, that thou mayest be saved,” and what is it that the prophet asks for from the Lord, when he says “Create in me a clean heart, O God,” and again: “Thou shalt wash me, and I shall be whiter than snow?” What is it that is said to us: “Enlighten yourselves with the light of knowledge;” and this which is said of God: “Who teacheth man knowledge;” and: “the Lord enlightens the blind,” or at any rate this, which we say in our prayers with the prophet: “Lighten mine eyes that I sleep not in death,” unless in all these there is a declaration of the grace of God and the freedom of our will, because even of his own motion a man can be led to the quest of virtue, but always stands in need of the help of the Lord? For neither does anyone enjoy good health whenever he will, nor is he at his own will and pleasure set free from disease and sickness. But what good is it to have desired the blessing of health, unless God, who grants us the enjoyments of life itself, grant also vigorous and sound health? But that it may be still clearer that through the excellence of nature which is granted by the goodness of the Creator, sometimes first beginnings of a good will arise, which however cannot attain to the complete performance of what is good unless it is guided by the Lord, the Apostle bears witness and says: “For to will is present with me, but to perform what is good I find not.”