What does the Bible say about Christ's faithfulness?

In 2 Timothy 2:13, we see that even if we believe not, He remains faithful, for He cannot deny Himself. This assures us that our salvation relies not on our faithfulness, but on His unchanging character and commitment to His elect. His faithfulness is a foundational truth of the gospel, reminding us that regardless of our unworthiness or failures, Christ's promises and love do not waver. This truth is not merely an abstract doctrine but has real implications for our lives, encouraging us to trust in His perfect faithfulness.