Does anyone know any good quotes?

Hey,
I have to write a speech and I need a quote or a famous phrase. Does anyone know any good quotes like "honesty is the best policy" Any Ideas?? thankx

"Know that nothing in the world is to be feared, it is simply to be understood"

"What can not destroy us can only make us stronger"

"Know that noone can make you feel inferior with out your consent"

"Its a small world, but it gets bigger as you expand your social circle"

"Keep your friends close and your enemies closer"

"Live. Laugh. Love"

"Let yourself love more than you can recieve that way the extra will keep circulating"

"be kind to unkind people, they need it the most"

look before you leep

"The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt." -Bertrand Russell.

"the best inheritance a parent can give there child is a few minutes of there time every day"
...know heaps more too but id be here forever!