Almost every famous person at least once in their life said something that was remembered by the society, and considered meaningful, important or just funny. Those quotations can be mentioned in various situations. Often they are used in speeches or in a humorous way. In order to find some of them grub around.
Diogenes the cynic
Date: September 3, 2007
[When asked what was the proper time for supper] If you are a rich man, whenever you please; and if you are a poor man, whenever you can.