What does the Bible say about the faithfulness of God?

The Bible often emphasizes God's unwavering faithfulness, particularly in 2 Timothy 2:11-13, which states, "If we are faithless, He remains faithful; He cannot deny Himself." This highlights the essential truth that our salvation and security do not hinge on our faithfulness but on God's unchanging character. The believer's confidence rests on the assurance that God will not forsake His promises, regardless of our shortcomings. His faithfulness assures us that He will complete the good work He began in us, leading us into eternal life.