Charles H. Spurgeon on Psalms 61:2

Lead me to the rock that is higher than I. The tower, in Ps 18:2, is "an high tower, "and the rock is here an high rock, the rock higher than I; and yet there is a way to get into the highest towers; by scaling ladders a man may get over the high walls of towers. This tower and rock were too high for David himself to get into, and therefore he sets to the scaling ladder. "Lead me to the rock, and into the tower that is higher than I. Hear my cry, attend unto my prayer." So he makes prayer the scaling ladder to get upon that rock and into that tower that otherwise had been too high for him; he gets that safety and deliverance which otherwise but by prayer unto God had been impossible to have been obtained. Jeremiah Dyke.