The Catechism in Questions & Answers

278. What are the fundamental prerequisites for obtaining the grace offered in the gospel?

First of all, the individual must recognise that he is a sinner. Then he must come to believe that it has become possible for the sinner to be reconciled with God through Jesus Christ, and that the sinner can attain the righteousness valid before God through belief in Christ: “Therefore, as through one man’s offence judgement came to all men, resulting in condemnation, even so through one Man’s righteous act the free gift came to all men, resulting in justification of life” (Romans 5: 18).

Righteousness before God / justification: to be righteous before God—in other words, to have attained justification—means: the believer is pleasing to God. God accepts the sinner, and grants him grace and forgiveness.