Charles H. Spurgeon on Psalms 64:4

That they may shoot in secret. The wicked are said to shoot their arrows in secret at the perfect; and then "they say, Who shall see them?" Ps 64:5. Thus Satan lets fly a temptation so secretly, that he is hardly suspected in the thing. Sometimes he useth a wife's tongue to do his errand; another while he gets behind the back of a husband, friend, servant, etc., and is not seen all the while he is doing his work. Who would have thought to have found a devil in Peter, tempting his Master, or suspected that Abraham should be the instrument to betray his beloved wife into the hands of a sin? yet it was so. Nay, sometimes he is so secret, that he borrows God's bow to shoot his arrows from, and the poor Christian is abused, thinking it is God chides and is angry, when it is the devil tempts him to think so, and only counterfeits God's voice. William Gurnall.