"I wish I'd said that" (by Oscar Wilde, to a witty remark by James McNeill Whistler), to which Whistler riposted: "You will, Oscar, you will!"

Some quotes I'm planning to use someday

The only part of college not mired in tradition is the price. [Ben Wildavsky]

Neoclassical economic theory models "smart people in unbelievably simple situations," while the real world is populated by "simple people [coping] with incredibly complex situations." [Axel Leijonhufvud, quoted by Herbert Gintis]

Neal Stephenson is the Homer of geek mythology. [review in San Diego Union-Tribune]

Quotes I've already used

Errors using inadequate data are much less than those using no data at all. [Charles Babbage]

As far as the laws of mathematics refer to reality, they are not certain; and as far as they are certain, they do not refer to reality. [Einstein]

All models are wrong, but some are useful. [Box and Draper]

The human animal differs from the lesser primates in his passion for lists of "Ten Best". [H. Allen Smith]

Action speaks louder than words -- but not nearly as often. [Mark Twain]

There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact. [Mark Twain]

In my experience most mathematicians are intellectually lazy and especially dislike reading experimental papers. [Francis Crick]