For there is no faithfulness in their mouth; their inward part is pure wickedness; their throat is an open sepulcher; they flatter with their tongue.
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Augustine of Hippo
11. "Direct in Thy sight my way." Nothing is clearer, than that he here sets forth that time, in which he is journeying onward. For this is a way which is traversed not in any regions of the earth, but in the affections of the heart. "In Thy sight," he says, "direct my way:" that is, where no man sees; who are not to be trusted in their praise or blame. For they can in no wise judge of another man's conscience, wherein the way toward God is traversed. Hence it is added, "for truth is not in their mouth" (ver. 9). To whose judgment of course then there is no trusting, and therefore must we fly within to conscience, and the sight of God. "Their heart is vain." How then can truth be in their mouth, whose heart is deceived by sin, and the punishment of sin? Whence men are called back by that voice, "Wherefore do ye love vanity, and seek a lie?"
12. "Their throat is an open sepulchre." It may be referred to signify gluttony, for the sake of which men very often lie by flattery. And admir...