Shortly after [St. Augustine had finished his theological tome On the Trinity], he was walking along the Mediterranean shore on the coast of North Africa when he chanced upon a boy who kept filling a bucket with seawater and pouring it into a large hole in the sand.

"Why are you doing that?" Augustine asked the boy.

"I'm pouring the Mediterranean Sea into the hole," the boy replied in all seriousness.

"My dear boy, what an impossible thing to try to do!" chided Augustine. "The sea is far too vast, and your hole is far too small."

Then as Augustine continued his walk, it dawned on him that in his efforts to write on the Trinity he was much like that boy: the subject was far too vast, and his mind was far too small!