Luther

I know and witness before all the world, that through the grace of God, I am able to believe in this Man, and mean to stay with Him, and to yield up both life and blood and everything, before I would betray Him; such is the faith in which I stand and live. After that I go out, eat and drink, sleep and wake, rule and serve, and work and act and suffer, and all in the faith in Him into whom I am baptised, and I know that in this manner I bear fruit which is good and well-pleasing to God.—Exposition Jn xiv, xv