How can we be sure that God will keep His promise of salvation?

Our assurance that God will keep His promise of salvation is grounded in His unchanging nature and faithfulness. As stated in Numbers 23:19, 'God is not a man that he should lie,' which affirms that He is sovereign and incapable of failure. This assurance is further supported by Romans 8:30, indicating that all whom He predestines, He also justifies and glorifies. Thus, the promise of salvation is anchored in God's perfect will and His ability to bring it to completion, ensuring that His appointments are always fulfilled.