Grace vs. Performance-Matthew 20:14, 15
In these verses, we can see that the grace of God for us, does not depend on what we have done, or not done for God, and does not depend on us, how holy or righteous we live, before God. Of course, we have to keep the commandments of God, because Jesus said that the one who keeps his commands is the one who loves him. We keep his commands because we are a new creation, born again by the Holy Spirit.
God decides to give his grace to us, based on his great love for us, because He is Love, and not because of what we have done! He loved us, even before we were saved - John 3:16.
The grace of God for us is entirely depended on who God is, and what He has done for us through Jesus, and does not depend on what we have done or not done.