What is the definition of grace?
Grace is that attribute of God that pours out undeserved favor and mercy on sinners. It is opposed to legalism and law-righteousness; believers are not under the law but under grace. It flows from God's love demonstrated at the cross, where Christ died for undeserving sinners.
Les explains that grace is not the concept most people have of it. It is God's attribute capable of pouring out undeserved favor and mercy on sinners—sons of Adam—all because of the love poured out at the cross. He contrasts being under the law with being under grace, and Paul refuses to frustrate God's grace by adding law-keeping. If righteousness comes by the law or legalism, then Christ is dead in vain. Grace also means God does not expect us never to fall; when we do, He is ready to pick us up and put us on our way.