How do we know God's choosing in salvation is true?

Scripture is replete with affirmation of God's sovereign choice in salvation. In John 15:16, Jesus states, 'You did not choose me, but I chose you.' This underscores that human efforts or decisions do not contribute to the salvation process; instead, God initiates it. Romans 8:29-30 further expounds on this divine choosing, showing that those God foreknew, He called and justified. Thus, the assurance of God's sovereign choice in salvation rests firmly on His unchanging nature and His will to save His chosen people.