What a precious truth this catechism contains!
Question 29: How can we be saved?
Answer: Only by faith in Jesus Christ and in his substitutionary atoning death on the cross; so even though we are guilty of having disobeyed God and are still inclined to all evil, nevertheless, God, without any merit of our own but only by pure grace, imputes to us the perfect righteousness of Christ when we repent and believe in him.
Scripture: Ephesians 2:8–9
For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast.
Commentary by Charles Haddon Spurgeon
Being justified by faith, we have peace with God. Conscience accuses no longer. Judgment now decides for the sinner instead of against him. Memory looks back upon past sins, with deep sorrow for the sin, but yet with no dread of any penalty to come; for Christ has paid the debt of his people to the last jot and tittle, and received the divine receipt; and unless God can be so unjust as to demand double payment for one debt, no soul for whom Jesus died as a substitute can ever be cast into hell. It seems to be one of the very principles of our enlightened nature to believe that God is just; we feel that it must be so, and this gives us our terror at first; but is it not marvelous that this very same belief that God is just, becomes afterwards the pillar of our confidence and peace! If God is just, I, a sinner, alone and without a substitute, must be punished; but Jesus stands in my place and is punished for me; and now, if God is just, I, a sinner, standing in Christ, can never be punished. God must change his nature before one soul for whom Jesus was a substitute can ever by any possibility suffer the lash of the law. Therefore, Jesus having taken the place of the believer—having rendered a full equivalent to divine wrath for all that his people ought to have suffered as the result of sin, the believer can shout with glorious triumph, “Who shall lay anything to the charge of God’s elect?” Not God, for he has justified; not Christ, for he has died, “yes rather has risen again.” My hope does not live because I am not a sinner, but because I am a sinner for whom Christ died; my trust is not that I am holy, but that being unholy, he is my righteousness. My faith does not rest upon what I am, or shall be, or feel, or know, but in what Christ is, in what he has done, and in what he is now doing for me. On the lion of justice the fair maid of hope rides like a queen.