1. Since justification is by faith, it cannot be earned by works - Romans 4:1-8
2. Since Abraham was justified before being circumcised, circumcision is not a requirement for salvation - 4:9-12
3. Since Abraham was justified by faith centuries before the Law was given, justification cannot be based on adherence to the Law - 4:13-17
4. Since Abraham was justified by faith then we can have confidence to be justified by faith as well - Romans 4:18-25
