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

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

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

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

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

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.

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