Merit is a work for the sake of which Christ gives rewards. But no such work is to be found, for Christ gives by promise. Just as if a prince should say to me, "Come to me in my castle, and I will give you a hundred florins." I do a work, certainly, in going to the castle, but the gift is not given me as the reward of my work in going, but because the prince promised it to me.
Martin LutherHe who believes in God is not careful for the morrow, but labors joyfully and with a great heart. "For He giveth His beloved, as in sleep." They must work and watch, yet never be careful or anxious, but commit all to Him, and live in serene tranquility; with a quiet heart, as one who sleeps safely and quietly.
Martin Luther