Quotes I like:

"Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure. It is our light, not our darkness, that frightens us most. We ask ourselves, 'Who am I to be brilliant, gorgeous, talented, and famous?' Actually, who are you not to be? You are a child of God. Your playing small does not serve the world. There is nothing enlightened about shrinking so that people won't feel insecure around you. We were born to make manifest the glory of God that is within us. It's not just in some of us; it's in all of us. And when we let our own light shine, we unconsciously give other people permission to do the same. As we are liberated from our own fear, our presence automatically liberates others.”
Used by Nelson Mandela in his 1994 inaugural speech

"Today we come across an individual who behaves like an automaton, who does not know or
understand himself, and the only person that he knows is the person that he is supposed to be, whose meaningless chatter has replaced communicative speech, whose synthetic smile has replaced genuine laughter, and whose sense of dull despair has taken the place of genuine pain. Two statements may be said concerning this individual. One is that he suffers from defects of spontaneity and individuality which may seem to be incurable. At the same time it may be said of him he does not differ essentially from the millions of the rest of us who walk upon this earth." - Erich Fromm

"Into the hands of every individual is given a marvelous power for good or evil -- the silent unconscious, unseen influence of his life. This is simply the constant radiation of what man really is, not what he pretends to be."- William George Jordan

"The heart dies a slow death, shedding each hope like leaves... Until one day there are none. No hopes. Nothing remains. "
- Memoirs of a Geisha

"I never told my religion, nor scrutinized that of another. I never attempted to make a convert, nor wished to change another's creed. I have judged others' religions by their lives, for it is from our lives and not our words that our religions must be read."
- Thomas Jefferson

“Be who you are and say what you feel, because those who mind don't matter, and those who matter don't mind.” Theodor Geisel, (Dr. Seuss)

“Dance like no one is watching,
Love like you'll never be hurt,
Sing like no one is listening,
Live like it's heaven on earth.”
- William Purkey

or alternatively, this translation of an Irish proverb:
"Dance as if no one's watching, sing as if no one's listening, and live every day as if it were your last."