You cannot sin so much as God can forgive. If it comes to a pitched battle between sin and grace, you shall not be so bad as God shall be good. I will prove it to you. You can only sin as a man, but God can forgive as a God. You sin as a finite creature, but the Lord forgives as the infinite Creator.
C. H. Spurgeon, "The Exceeding Riches of His Grace," on Ephesians 2:7 (Metropolitan Tabernacle Pulpit [Pilgrim Publications], 28:344-345)