It's better to solve the right problem approximately than to solve the wrong problem exactly.

The greatest value of a picture is when it forces us to notice what we never expected to see.

I know of no person or group that is taking nearly adequate advantage of the graphical potentialities of the computer.

There is no data that can be displayed in a pie chart, that cannot be displayed BETTER in some other type of chart.

Be approximately right rather than exactly wrong.

To be able to say that "if we change our point of view in the following way ... things are simpler" is always a gain.

In a world in which the price of calculation continues to decrease rapidly, but the price of theorem proving continues to hold steady or increase, elementary economics indicates that we ought to spend a larger and larger fraction of our time on calculation.