Psalms 66:16-20 - Exposition

In conclusion, the psalmist calls on all pious Israelites to "hearken," while he explains to them how it is that his prayers and vows have been so effectual. It has been because his prayers and vows proceeded from a sincere and honest heart, one which was free from "iniquity" ( Psalms 66:18 ). As Hengstenberg points out, this portion of the psalm is didactic, and inculcates the lesson "that there is no way of salvation except that of well doing." God, by answering the psalmist's prayer, and giving the deliverance for which he had entreated, had set his testimony to the fact of the psalmist's integrity ( Psalms 66:19 , Psalms 66:20 ).