Musar zu Ijow 5:12

But he, who resorts to superciliousness unnecessarily and takes only his own counsel, is like him of whom it was said (Prov. xviii. i), "He intermeddleth with all wisdom." Men disregard such a man and desire not his presence: of such as these the sage saith (Prov. xxvi. 16), "The sluggard is wiser in his own conceit than seven men that can render a reason." And often, moreover, his vanity impels him to undertake something outside of his usual course of action, because he relies upon his opinion saving him and upon his counsel protecting him. It is this that causes him to stumble; thus it is said (Job v. 12), "He disappointeth the devices of the crafty, so that their hands cannot perform their enterprise."