January 6, 2007 12:09pm CST
when one door of hapiness closes another opens but often we look so long at the closed door that we do not see the one which has opened for us.
6 Jan 07
Thought experiments have been used in philosophy, physics, and other fields. They have been used to pose questions in philosophy at least since Greek antiquity, some pre-dating Socrates. In physics and other sciences many famous thought experiments date from the 19th and especially the 20th Century, but examples can be found at least as early as Galileo.