How do we know God's grace, mercy, and peace are true?

The certainty of God's grace, mercy, and peace rests in His sovereign character and the truth of His Word. In 1 Timothy 1:2, Paul explicitly states that this grace, mercy, and peace come from 'God our Father, and Jesus Christ our Lord.' This shows that these blessings are not whimsies of chance; they are declarations from God, who sovereignly gives them to those whom He has chosen. Furthermore, historical and prophetic fulfillment through Jesus provides a foundation for believing in these doctrines. For instance, Isaiah 9:6 calls the Messiah the 'Prince of Peace,' affirming that His work establishes eternal peace. Our assurance lies in knowing that God's promises are always fulfilled.