Anthem, Ayn Rand:
choose friends from among your fellow humans, but neither masters nor servants. love and respect you friends, but neither command nor obey them. respect the personal boundaries of the other.
mo'Dajvo' pa'wIjDaq je narghpu' He'So'bogh SajlIj
One that has really stuck with me since I went through my divorce and helped fuel my personal changes...
"Are you willing to give up who you are, for who you can become?" - Dr Rene Dubos
"Well, then," the Cat went on, "you see a dog growls when it's angry, and wags its tail when it's pleased. Now I growl when I'm pleased, and wag my tail when I'm angry. Therefore I'm mad."