The following devotional from A. W. Tozer refers to the faith which George Muller exhibited. We can trust God the same way Muller did. God has NOT changed.
...yet you do not have because you do not ask. - James 4:2
It was a saying of George Mueller that faith grows with use. If we would have great faith we must begin to use the little faith we already have. Put it to work by reverent and faithful praying, and it will grow and become stronger day by day. Dare today to trust God for something small and ordinary and next week or next year you may be able to trust Him for answers bordering on the miraculous. Everyone has some faith, said Mueller; the difference among us is one of degree only, and the man of small faith may be simply the one who has not dared to exercise the little faith he has.
According to the Bible, we have because we ask, or we have not because we ask not. It does not take much wisdom to discover our next move. Is it not to pray, and pray again and again till the answer comes? God waits to be invited to display His power in behalf of His people. The world situation is such that nothing less than God can straighten it out. Let us not fail the world and disappoint God by failing to pray. taken from The Set of the Sail, pp. 33-34
"Lord, I think I can do that! I know my faith needs to grow, but today I'll exercise what faith I have and anticipate that growth and stretching. Amen."