How do we know God is faithful even in our unbelief?

Scripture affirms God's unwavering faithfulness, particularly in John 20:24-29 where Jesus reassures Thomas of His presence and peace despite Thomas's doubt. Even when believers face moments of weakness or lapses in faith, God's covenant faithfulness endures. The narrative of Thomas serves as an illustration of how Christ responds to our doubts with grace and compassion, affirming that, ‘If we believe not, yet he abideth faithful: he cannot deny himself.’ This truth provides comfort and assurance as believers navigate doubts and fears, reminding us that our identity as God's children is secure in Christ, despite our wavering beliefs.