Charles H. Spurgeon on Psalms 36:4

He setteth himself in a way that is not good. Proud sinners have strongest conceit that they go right, at least in the way of their choice. Satan blindeth them so, that they mistake both the end and the way: in their count they are running to heaven, when they are posting to hell: he serveth them kindly with fresh post horses. Sometimes he mounts them on drunkenness, and when they have run a stage on that beastliness, he can mount them on lechery. Again, he can refresh them with avarice; and if they be weary of that slow jade, he setteth them on lofty ambition, and to make them more spirited he can horse them on restless contention. Every one seeth not Satan's enquiry: there is no complexion or disposition, but he hath a fit horse for it, and that of itself. Every man's predominant is a beast of Satan's saddling and providing to carry men to hell. The way is one, the post master is one, he is to be found at every stage, mounting his gallants, their horses are all of one kind though not of one colour. Happy is the man whom God dismounts in that evil way, and more happy is he who taketh with that stay, and turneth his course to heaven. William Struther.