Warren Buffett is one of the best learning machines on this earth. The turtles which outrun the hares are learning machines. If you stop learning in this world, the world rushes right by you.

Come, my child,” I said, trying to lead her away. “Wish good-bye to the poor hare, and come and look for blackberries.””Good-bye, poor hare!” Sylvie obediently repeated, looking over her shoulder at it as we...