Absolutely Certain
Little Johnny’s grandfather was something of a philosopher and never missed an opportunity to give out bits of sage advice to his grandson.
“Yessirree, Johnny,” he said one day, “remember, fools are certain, but wise men hesitate.”
“Are you sure, Grandpa?” asked Johnny.
“Yes, my boy,” said the old man, laying his gnarled hand on the youth’s head, “I’m absolutely certain.”