Charles H. Spurgeon on Psalms 73:18

The Psalmist's sorrow had culminated, not in the fact that the ungodly prospered, but that God had arranged it so: had it happened by mere chance, he would have wondered, but could not have complained; but how the arranger of all things could so dispense his temporal favours, was the vexatious question. Here, to meet the case, he sees that the divine hand purposely placed these men in prosperous and eminent circumstances, not with the intent to bless them but the very reverse. Surely thou didst set them in slippery places. Their position was dangerous, and, therefore, God did not set his friends there but his foes alone. He chose, in infinite love, a rougher but safer standing for his own beloved. Thou castedst them down into destruction. The same hand which led them up to their Tarpeian rock, hurled them down from it. They were but elevated by judicial arrangement for the fuller execution of their doom. Eternal punishment will be all the more terrible in contrast with the former prosperity of those who are ripening for it. Taken as a whole, the case of the ungodly is horrible throughout; and their worldly joy instead of diminishing the horror, actually renders the effect the more awful, even as the vivid lightning amid the storm does not brighten but intensify the thick darkness which lowers around. The ascent to the fatal gallows of Haman was an essential ingredient in the terror of the sentence —"hang him thereon." If the wicked had not been raised so high they could not have fallen so low.