A combination of several, not particularly quotes from anyone:
"Be happy as you will; cry as you need; be angry when you have no other choice."
"Do no harm, if you can help it."
"Live your own life, and let others live theirs; share your life with those who would share theirs with you, though."
"Question everything, especially yourself, and especially your beliefs. The best mind admits its faults and wrongs, knows what it can prove, knows what is faith and what is understanding."
"Love is powerful, and love is rare; when you find it, don't let it go. But beware, for love that blinds and love that wounds, whomsoever it does, is to be abhorred and avoided."