Psalms 91:2

In the second verse he repeats the truth which he had already inculcated, showing at the same time that he speaks from his personal feeling and experience as a believer. This is very necessary in one who would be a teacher; for we cannot communicate true knowledge unless we deliver it not merely with the lips, but as something which God has revealed to our own hearts. (576) The Psalmist accordingly gives evidence, that what he had taught in the preceding verse accorded with his own inward experience. Some read, I will say concerning the Lord, and the Hebrew prefix, ל, lamed, may be so rendered; but the other translation which I have given conveys the more forcible meaning. The believer does more than simply resolve to make God his fortress; he draws near in the trust of the Divine promises, and familiarly addresses God. This confidence in prayer affords an additional proof how securely the people of God can dwell under his shadow. This holy species of boasting constitutes the very highest triumph of faith, when we betake ourselves to God without fear under our worst trials, and are fully persuaded that he answers all our prayers, nay, that we have in him a sufficiency and a superabundance of help.