In my high school freshman-year religion class, a fellow student asked the teacher, Brother Linus, why he was so sure God existed.
The teacher walked to the open classroom door and craned his neck to the right.
"As you can see, the corridor on this floor bends about 60 degrees to the right," Brother Linus said. "Let's say you began sprinting down the corridor at top speed. What if, just around the corner, a furniture crew was moving a big heavy desk just out of your sight -- and there you were... sprinting top speed right for it? You'd never know until it was too late.
"Now imagine a benevolent God seeing all this unfold, and removing that furniture crew, and that big heavy desk, just before you rounded the corner. You'd never know He did it. It would never occur to you that He had done his work."
I'm not especially religious... but on this Thanksgiving Day, I express my thankfulness for all the furniture crews and all the desks that disappeared from my path without my knowing it.