The game of golf would lose a great deal if croquet mallets and billiard cues were allowed on the putting green.
The basic idea of Western science is that you don't have to take into account the falling of a leaf on some planet in another galaxy when you're trying to account for the motion of a billiard ball on a pool table on earth. Very small influences can be neglected. There's a convergence in the way things work, and arbitrarily small influences don't blow up to have arbitrarily large effects.
If we're open to it, God can use even the smallest thing to change our lives. . . to change us. It might be a laughing child, car brakes that need fixing, a sale on pot roast, a cloudless sky, a trip to the woods to cut down a Christmas tree, a school teacher, a Dunhill Billiard pipe. . . or even a pair of shoes. Some people will never believe. They may feel that such things are too trivial, too simple, or too insignificant to forever change a life. But I believe. And I always will.