Does God judge people by their words and deeds, or by whether they believe?

Faith and deeds stand side by side in the same speech of Jesus, so they are not meant to compete. In John 5 he says, “He that heareth my word, and believeth on him that sent me, hath everlasting life, and shall not come into condemnation” (5:24), and five verses later that “they that have done good” will rise “unto the resurrection of life” (5:29). Faith and deeds belong together: faith is the root, and deeds are the visible fruit by which the justice of the verdict can be seen. John 3 joins them the same way. Those who do not believe are condemned, and the reason given is that “men loved darkness rather than light, because their deeds were evil” (3:19), while “he that doeth truth cometh to the light” (3:21).

Matthew 12:37 works the same way. Jesus has just said that “the tree is known by his fruit” and that “out of the abundance of the heart the mouth speaketh” (12:33-34). Words are judged because they show what the heart is. In Luke 10 Jesus answers a lawyer on the law’s own terms: whoever truly loved God with all his heart and his neighbour as himself would live. The lawyer at once tried to narrow the command, “willing to justify himself” (10:29), and the parable of the Good Samaritan shows how far short of it people fall.

So God judges by deeds, and the deeds show whether a person has believed. Faith is not a rival to good works; it is trust in Christ that makes a person new (“born again”, John 3:3) and so changes how he lives. Jesus could even call believing “the work of God” (John 6:29).

Salvation and reward

Many Protestants distinguish the question of who is saved, settled by faith in Christ, from the question of reward, measured by works: believers too must appear before “the judgment seat of Christ” (2 Corinthians 5:10). Some, especially dispensationalists, see this as a separate judgement from that of the dead in Revelation 20:11-15.

Works done in grace

Catholic and Orthodox Christians agree that faith and deeds cannot be separated, but hold that good works done in God’s grace are themselves part of what God rewards with eternal life, not only evidence of faith. They point to judgement scenes such as Matthew 25:31-46, where the verdict turns on deeds of mercy.

Christians differ on whether works at the judgement serve only as the evidence of faith, as Protestants teach, or also, when done in grace, as part of what God rewards with eternal life, as Catholics and Orthodox teach. Mark 16:16 belongs to the longer ending of Mark (16:9–20), which the two oldest complete Greek manuscripts, Codex Sinaiticus and Codex Vaticanus, lack; many scholars doubt that the ending belongs to Mark’s original Gospel. The verse’s teaching matches John 3:18, and its second half makes unbelief, not lack of baptism, the ground of condemnation.