From perissos (exceeding). Abundance, surplus, that which overflows beyond what is needed. Used of the abundance of grace and the overflow of the heart.
Paul declares that where sin increased, grace abounded all the more (Romans 5:17). Jesus said that out of the overflow of the heart the mouth speaks (Matthew 12:34). The Christian life is characterized by abundance, not scarcity. God's grace always exceeds sin's damage.