Reality rests on Truth. What is not true is a deception. Belief in God is faith in what is real. To question God is to cast doubt on truth. We tend to believe what we can see. Faith requires that we believe in what we do not see (Heb. 11:1). Unlike the scientific method, faith does not require tangible proof. That does not, however, mean that belief in God has no reasonable demonstration of proof. It is not unreasonable to take God's demonstrated trustworthiness through his Word as reason to believe. Has God ever lied? Has His Word ever failed?
Prophecy fulfilled, faith demonstrated and rewarded, miracles performed; All these point to the unseen God. The Bible in history is is a demonstration of the reality of God. The truth of who He is. When His word speaks history before it occurs (Lam. 3:37), the historical fact becomes testimony to the veracity and reality of God. God also vindicated the faith of individuals as he worked in their lives. Noah undertook a great building project, and God vindicated him. Abraham believed God and God vindicated his faith by fulfilling the promise of a son. The faith of Moses brought judgement upon Egypt, and lead the Hebrews out of oppression through parted waters. Miracles themselves are reasonable proofs of the reality of God. An exception in consistent laws were used of God to display his almighty power, imminent involvement, and planning. They were testimony to the reality of God (Neh 9:17; John. 10:25; John 14:11; Heb. 2:4).
What is truth? What is real? Faith says God is real, not simply by the force of belief, as if wishing makes it so, but on the basis of reasonable evidence (Acts 26:25; 1 Peter 3:15). God has given us reason to believe in Him. If we still reject his testimony we judge him as untrue. We sit in judgement of His Word. It is this Word that will judge us in the end (John 12:48). When the truthfulness of God is found trustworthy, faith has found a resting place. We can trust the Word of God who cannot lie (Titus 1:2).