God's grace is the gift of God, and not of our works (Ephesians 2:8-9). God's grace is given to us through faith in Christ. Grace saves us to the glory of God in Christ. Grace is unmerited favor in us as believers in the Lord Jesus Christ.
God's grace is through the everlasting covenant (Hebrews 13:20-21). The Lord Jesus Christ changes our hearts, that is our mind, will and emotions. For we are His workmanship, created in Christ Jesus (Ephesians 2:10). We become a new creation in Christ (2 Corinthians 5:17).
God's grace is the work of God in us. God is working in you what is well pleasing in His sight through Jesus Christ (Hebrews 13:21). The Spirit of grace works in us to do God's will. The apostle Paul testified, I labored more abundantly than they all, yet not I, but the grace of God which was with me (1 Corinthians 15:10).
God's grace enables us to endure, abide, and persevere. Our faith is tried and tested. It is found to be true, because the source is true. We are looking unto Jesus, the author and finisher of our faith (Hebrews 12:2). Grace enables us to testify, I live by faith in the Son of God, who loved me and gave Himself for me (Galatians 2:20).