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

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.

An approximate answer to the right problem is worth a good deal more than an exact answer to an approximate problem.

Be approximately right rather than exactly wrong.

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.

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

When communicating results to non-technical types there is nothing better than a clear visualization to make your point.