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

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.

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

Far better an approximate answer to the right question, which is often vague, than the exact answer to the wrong question, which can always be made precise.

Numerical quantities focus on expected values, graphical summaries on unexpected values.

If we are going to make a mark (key 21), it might as well be a meaningful one.

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