Charles H. Spurgeon on Psalms 64:4

That they may shoot in secret at the perfect. They lie in ambush, with bows ready bent to aim a coward's shaft at the upright man. Sincere and upright conduct will not secure us from the assaults of slander. The devil shot at our Lord himself, and we may rest assured he has a fiery dart in reserve for us; He was absolutely perfect, we are only so in a relative sense, hence in us there is fuel for fiery darts to kindle on. Observe the meanness of malicious men; they will not accept fair combat, they shun the open field, and skulk in the bushes, lying in ambush against those who are not so acquainted with deceit as to suspect their treachery, and are to manly to imitate their despicable modes of warfare. Suddenly do they shoot at him, and fear not. To secrecy they add suddenness. They give their unsuspecting victim no chance of defending himself; they pounce on him like a wild beast leaping on its prey. They lay their plans so warily that they fear no detection. We have seen in daily life the arrow of calumny wounding its victim sorely; and yet we have not been able to discover the quarter from which the weapon was shot, nor to detect the hand which forged the arrowhead, or tinged it with the poison. Is it possible for justice to invent a punishment sufficiently severe to meet the case of the dastard who defiles my good name, and remains himself in concealment? An open liar is an angel compared with this demon. Vipers and cobras are harmless and amiable creatures compared with such a reptile. The devil himself might blush at being the father of so base an offspring.