I saw this on Ray Ortlund’s blog, and appreciated it so much I had to cite the whole thing here. Good, helpful, powerful truth.

The Lord is my light and my salvation;whom shall I fear? Psalm 27:1

“One of the best ways to dispel doubts and fears is to summon to our aid the very strongest doctrines and highest truths of religion. Weak doctrines will not be a match for powerful temptations.

No confidence is so well placed as confidence in God, no joy is like that which he gives, no deliverances are so manifestly glorious as those he works, life is never so sweet as when felt to be the renewed gift of God.

Courage is both a duty of man and a gift of God. We should sharply reprove ourselves for all disheartening timidity. . . . We must be heroic, or we must perish.”

W. S. Plumer, The Psalms, page 359.