But he speaks first of a pure lip, I will turn, he says, to the nations a pure lip. By this word he means, that the invocation of God’s name is his peculiar work; for men do not pray through the suggestion of the flesh, but when God draws them. It is indeed true, that God has ever been invoked by all nations; but it was not the right way of praying, when they heedlessly cast their petitions into the air: and we also know, that the true God was not invoked by the nations; for there was no nation then in the world which had not formed for itself some idol. As then the earth was full of innumerable idols, God was not invoked except in Judea only. Besides, though the unbelieving had an intention to pray to God, yet they could not have prayed rightly, for prayer flows from faith. God then does not without reason promise, that he would turn pure lips to the nations; that is, that he would cause the nations to call on his name with pure lips. We hence then learn what I have stated—that God cannot be rightly invoked by us, until he draws us to himself; for we have profane and impure lips. In short, the beginning of prayer is from that hidden cleansing of the Spirit of which the Prophet now speaks.