We have all messed up and sinned, but God credits the righteousness of Jesus Christ on our account. This is not excuse to live like we haven't been born again and we don't earn our salvation, we display our salvation because of what Jesus did. Temptation and sin are not the same thing. We should not give into temptation, instead, we need to do what the Lord wants us to do. Jesus had to suffer in order to be made complete.