Surely you did set them in slippery places: you cast them down into destruction.
All Commentaries on Psalms 73:18 Go To Psalms 73
Augustine of Hippo
AD 430
18. To wit, "because of deceitfulness Thou hast set upon them" (ver. 18). Because deceitful they are, that is fraudulent; because deceitful they are, they suffer deceits. What is this, because fraudulent they are they suffer a fraud? They desire to play a fraud upon mankind in all their naughtinesses, they themselves also suffer a frand, in choosing earthly good things, and in forsaking the eternal. Therefore, brethren, in their very playing off a fraud they suffer a fraud. In that which but now I said, brethren, "What manner of wit hath he who to gain a garment doth lose his fidelity?" hath he whose garment he hath taken suffered a fraud, or he that is smitten with so great a loss? If a garment is more precious than fidelity, the former doth suffer the greater loss: but if incomparably good faith doth surpass the whole world, the latter shall seem to have sustained the loss of a garment; but to the former is said, "What doth it profit a man if he gain the whole world, but suffer the loss of his own soul?" Therefore what hath befallen them? "Because of deceitfulness Thou hast set for them: Thou didst throw them down while they were being exalted." He hath not said, Thou didst throw them down because they were lifted up: not as it were after that they were lifted up Thou didst throw them down; but in their very lifting up they were thrown down. For thus to be lifted up is already to fall.
