Charles H. Spurgeon on Psalms 91:9

Here commences the second half of the Psalm. And it is as though the Psalmist feared lest (as is too often the case with us) we should, in dwelling on the promises and blessings of God, and applying them to ourselves, forget the condition to which they are annexed —the character of those who are to receive them. He therefore pauses here to remind us of the opening verses of the Psalm, by repeating again their substance. Mary B. M. Duncan.