What are your most favorite quotations, ones that you always believe in ?
Mine are:
"Why do you listen to your brother who heard from his friend who heard from a former piano teacher of her sister who heard from her uncle's wife who later admitted that the information is irrelevant?" (made by me

)
"A promise made is a debt unpaid."
"The ultimate measure of a man is not where he stands in moments of comfort, but where he stands in moments of challenge and controversy" (Martin Luther King, Jr.)
"Always use the proper name for things. Fear of a name increases fear of the thing itself" (Dumbledore in Harry Potter).
"Truth is a beautiful and terrible thing, and should therefore be treated with great caution" (Dumbledore in Harry Potter).