I do not nullify the grace of God for if righteousness were through the law then Christ died for no purpose.Galatians 2:11-22; Galatians 2:11-22
We can live in such a way that we make out as though Christ died for nothing. By rebuilding rules and requirements to try to gain righteousness before God we set aside the grace of God effectively turn away from the right standing we have before God through Christs death on the cross.