Charles H. Spurgeon on Psalms 10:7

Let us now hear the witnesses in court. Let the wretch speak for himself, for out of his own mouth he will be condemned. "His mouth is full of cursing and deceit and fraud." There is not only a little evil there, but his mouth is full of it. A three-headed serpent hath stowed away its coils and venom within the den of its black mouth. There is cursing which he spits against both God and men, deceit with which he entraps the unwary, and fraud by which, even in his common dealings, he robs his neighbours. Beware of such a man: have no sort of dealing with him: none but the silliest of geese would go to the fox's sermon, and none but the most foolish will put themselves into the society of knaves. But we must proceed. Let us look under this man's tongue as well as in his mouth; "under his tongue is mischief and vanity." Deep in his throat are the unborn words which shall come forth as mischief and iniquity.