How do we know that God's promises are secure?

In the context of 2 Timothy 2:13, where it states, 'He cannot deny himself,' we find assurance in God's unchanging character. His faithfulness is the guarantee of His promises; they are rooted in His nature. As believers, we can take comfort in knowing that regardless of our fluctuating faith, Christ's commitment to us remains firm and unwavering. This principle is foundational in the Christian doctrine of eternal security - that once redeemed, we are held by His power and promise to bring us to completion.