What does Romans 5:15 mean?
In the previous verse, Paul described Adam as a "type" of Christ. This doesn't mean that Adam had Christ-like qualities, but that they were alike in that their choices affected many, many people. One single action by Adam brought death to all who came after him. Adam broke God's command, bringing both sin and the resulting death into the world.Now Paul says that the free gift, Jesus' choice, is not like Adam's sin. What is the free gift? It is the action Christ took by dying in our place for our sin on the cross. The free gift brings salvation from death, rescue from the wrath of God, in judgment on sin.
Adam's action brought death to many people. Jesus' action brought the grace of God to many people. This free gift of God's grace brings the opportunity for life, for salvation, to everyone. All who trust in Christ will receive this gift, rather than facing death because of Adam's introduction of sin into the world.