Romans 4:19-21

Romans 4:19-21. And being not weak in faith, he considered not his own body now dead, when he was about an hundred years old, neither yet the deadness of Sarah’s womb: he staggered not at the promise of God through unbelief, but was strong in faith, giving glory to God; and being fully persuaded that, what he had promised, he was able also to perform.

That is the kind of faith we want, the faith that does not enquire how God can perform his promise, but believes that he will do it.