[It is] essentially wholesome and necessary, for a Christian to know, whether or not the will does any thing in those things which pertain unto Salvation. Nay, let me tell you, this is the very hinge upon which our discussion turns. It is the very heart of the subject
Martin LutherWe conclude, therefore, that a Christian lives not in himself, but in Christ and in his neighbor. Otherwise he is not a Christian. He lives in Christ through faith, in his neighbor through love. By faith he is caught up beyond himself into God. By love he descends beneath himself into his neighbor.
Martin LutherBe a sinner, and let your sins be strong, but let your trust in Christ be stronger, and rejoice in Christ who is the victor over sin, death, and the world.
Martin Luther