Luther on Assurance

Looking for grounds to be confident in your standing before God today? Hear the words of Martin Luther:

Since God has taken my salvation out of my hands and into his, making it depend on his choice and not mine, and has promised to save me, not by my own work and exertion but by his grace and mercy, I am assured and certain both that he is faithful and will not lie to me, and also that he is too great and powerful for any demons or any adversaries to be able to break him or to snatch me from him.

The Bondage of the Will, vol. 33 in Luther's Works (ed. Jaroslav Pelikan), p. 289.