An excellent site for language buffs, chiasmus.com is full of chiastic quotations. What is a chiasmus, you ask?
chiasmus (ky-AZ-mus) n. a reversal in the order of words in two otherwise parallel phrases. chiastic adj
A famous example, from President John F. Kennedy:
And so, my fellow Americans, ask not what your country can do for you; ask what you can do for your country.
This site is chock full of wordy goodness.
