Luke 10, 26 ff. Christ meets the question of the self-righteous scribe with the counter-question: What is written in the Law? How readest thou? The scribe answers correctly: Thou shalt love the Lord, thy God, with all thy heart, and with all thy soul, and with all thy strength, and with all thy mind; and thy neighbor as thyself. And now Christ says to him: This do, and thou shalt live. The Lord, on this occasion, testified that, if salvation is to come by way of the Law, only he who fulfils the Law can obtain it. (By the way, we are not to think that to those who do the will of God, salvation must come as a reward of their merit. By no means; their salvation, too, would be owing to the goodness of God.) But to return to our discussion, the aforementioned condition which is attached to the Law hurls us into despair.
On a certain occasion, when the Lord wished to instruct the disciples as to what they must preach, He said: Go ye into all the world and preach the Gospel to every creature. He that believeth and is baptized shall be saved. Mark 16, 15. 16. This shows that no condition whatever is attached to the Gospel; it is a promise of grace.