“All heaviness of mind and melancholy come of the devil; especially these thoughts, that God is not gracious unto him: that God will have no mercy upon him. Whosoever thou art, possessed with such heavy thoughts, know for certain, that they are a work of the devil. God sent his Son into the world, not to affright, but to comfort. Therefore be of good courage, and think, that henceforward thou art not the child of a human creature, but of God, through faith in Christ, in whose name thou art baptized; therefore the spear of death cannot enter into thee; he has no right unto thee, much less can he hurt or prejudice thee, for he is everlastingly swallowed up through Christ.”
Luther, Martin (2012-09-21). The Table Talk of Martin Luther (pp. 160-161). Dover Publications. Kindle Edition.