The following quote is by George McDonald, an author whom CS Lewis admitted was a great influence upon him. Heather and I first came across it when we were in Florida back in 1996, a time when we had committed to going to seminary, but had no way of knowing how we would finance it. God came through for us, and proved the truthfulness of these words. Again, in 1999, when we began work with RUF at Texas A&M, the account was 7k in the hole. God showed himself strong once again. Now as we face the daunting and somewhat discouraging task of raising money in order to do mission work in Peru, we find ourselves raising this ebenezer, remembering how God has been faithful throughout the years, and how "hither by Thy help I'm come."
"Because you don't see what can be done, you say God can do nothing--which is like saying there cannot be more within His scope than there is within yours. One thing is clear: if He saw no more than lies within your sight, He could not be God. The very impossibility you see in things points to the region God works in."
Which is just another way of saying with St. Paul, "And my God will meet all your needs according to His glorious riches in Christ Jesus" (Philippians 4:19).