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

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

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.

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

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

Visualization is often used for evil - twisting insignificant data changes and making them look meaningful. Don't do that crap if you want to be my friend. Present results clearly and honestly. If something isn't working - those reviewing results need to know.

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