Augustine of Hippo : The church was admonished to shun the beginning of sin. Which is that beginning of sin, like the head of a serpent? The beginning of all sin is pride. — EXPLANATIONS OF THE Psalms 74:13 Jerome : "His talk begins as foolishness and ends as evil madness. The fool prates on and on, but man does not know what will be; and who can tell him what will be after him? "So far the discussion has been about the fool, whose lips teach the wise man, or according to another interpretation, his lips make himself corrupt. The beginning and the end of his speech are foolishness and evil madness; or as Symmachus has translated it, confusion, or some kind of inconsistency of words. For while he doesn't keep to the one opinion, he thinks he can escape sin in the many arguments he speaks at the same time. But he does not remember all those who have gone before him, and does not know what will happen after him, and so is confused in ignorance and the darkness, promising himself false knowledge; by this he thinks that he is wise, and that he is learned, if he uses lots of words. This can be taken to refer to the heretics, who do not heed the words of wise men, but continue to argue different sides so they intertwine the beginning and end of their speech in vanity, confusion, and madness; and though they know nothing, they speak more than they know. — Commentary on Ecclesiastes