“The hardest thing in the world to understand is the income tax.”

“This is a question too difficult for a mathematician. It should be asked of a philosopher"(when asked about completing his income tax form)”

“The most amazing thing about the world is that we understand it.”

“Imagination is more important than knowledge. For knowledge is limited to all we now know and understand, while imagination embraces the entire world, and all there ever will be to know and understand.”

“Compound interest is the eighth wonder of the world. He who understands it, earns it ... he who doesn't ... pays it.”

“The most incomprehensible thing about the world is that it is at all comprehensible.”

“Any fool can know. The point is to understand.”