Hence this definition must be borne in mind—that works, however splendid they may appear before our eyes, are of no value or importance before God, except they flow from a pure heart. Augustine has very wisely explained this in his fourth book against Julia. He says, that it would be an absurd thing for the faithful to judge of works by the outward appearance; but that they ought to be estimated according to the fountain from which they proceed, and also according to their design. Now the fountain of works I consider to be integrity of heart, and the design or end is, when the object of men is to obey God and to consecrate their life to him. Hence then we learn the difference between good and evil works, between vices and virtues, that is, from the inward state of the mind, and from the object in view. This is the subject of the Prophet in the first clause; and he drew an answer from the priests, which was wholly consistent with the law; and it amounted to this, that no work, however praised and applauded by the world, is valued before God’s tribunal, except it proceeds from a pure heart.