This list will probably always be incomplete.

Albert Camus:

• "In the midst of winter, I found there was, within me, an invincible summer."

Albert Einstein:

• "I have no special talents. I am only passionately curious."

Audrey Hepburn: (unsure of true origin but she's often cited for these quotes)

• "For attractive lips, speak words of kindness, For lovely eyes, seek out the good in people, For a slim figure, share your food with the hungry, For beautiful hair, let a child run their fingers through it once a day, For poise, walk with the knowledge that you never walk alone."
• "Remember, if you ever need a helping hand, you will find one at the end of each of your arms. As you grow older, you will discover that you have two hands, one for helping yourself and the other for helping others."
• "You can tell more about a person by what he says about others than you can by what others say about him."

Bill Watterson:

• "That’s one of the remarkable things about life. It’s never so bad that it can’t get worse."

Bob Marley:

• "The truth is, everyone is going to hurt you. You just got to find the ones worth suffering for."

Buddha:

• "Holding on to anger is like grasping a hot coal with the intent of throwing it at someone else; you are the one who gets burned."

C.S. Lewis:

• "If I find in myself desires which nothing in this world can satisfy, the only logical explanation is that I was made for another world."
• "You don't have a soul. You are a soul. You have a body."

Charles Bukowski:

• "I am my own god. We are here to unlearn the teachings of the church, state, and our educational system. We are here to drink beer. We are here to kill war. We are here to laugh at the odds and live our lives so well that Death will tremble to take us."
• "I don't hate people, I just feel better when they aren't around."

Chuck Palahniuk:

• "We all die. The goal isn't to live forever. The goal is to create something that will."

Dr. Seuss:

• "Be who you are and say what you feel, because those who mind do not matter and those who matter do not mind."
• "I like nonsense, it wakes up the brain cells. Fantasy is a necessary ingredient in living, It’s a way of looking at life through the wrong end of a telescope. Which is what I do, And that enables you to laugh at life’s realities."

E.E. Cummings:

• "To be nobody but yourself in a world that's doing its best to make you somebody else, is to fight the hardest battle you are ever going to fight. Never stop fighting."

Ellen Hopkins:

• "But though I was very much in lust with him, I knew from the start we were nothing like 'forever'. Maybe because forever is such a scary place."

Elvis Presley:

• "Sad thing is, you can still love someone and be wrong for them."

Arun Gandhi:

• "Forgiveness is me giving up my right to hate you for hurting me."

Mohandas Gandhi:

• "I like your Christ, I do not like your Christians. Your Christians are so unlike your Christ."

J.K. Rowling:

• "Humans have a knack for choosing precisely the things that are worst for them."

J.R.R. Tolkien:

• "Little by little, one travels far."

Kid Cudi:

• "I smoke to get high because the world is so low."

Lewis Carrol:

• "Contrariwise, if it was so, it might be; and if it were so, it would be; but as it isn't, it ain't. That's logic."

Marilyn Monroe:

• "If you're going to be two-faced, at least make one of them pretty."

Mark Twain:

• "Growing old is mandatory--growing up is optional."
• "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do. So throw off the bowlines. Sail away from safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover."

Mitch Albom:

• "The truth is, once you learn how to die, you learn how to live."

Mother Theresea:

• "People are unreasonable, illogical, and self-centered. Love them anyway. If you do good, people may accuse you of selfish motives. Do good anyway. If you are successful, you may win false friends and true enemies. Succeed anyway. The good you do today may be forgotten tomorrow. Do good anyway. Honesty and transparency make you vulnerable. Be honest and transparent anyway. What you spend years building may be destroyed overnight. Build anyway. People who really want help may attack you if you help them. Help them anyway. Give the world the best you have and you may get hurt. Give the world your best anyway."

Oscar Wilde:

• "Fashion is a form of ugliness so intolerable that we have to alter it every six months."
• "Morality, like art, means you have to draw a line someplace."

Stephen King:

• "Monsters are real and ghosts are real, too. They live inside us and sometimes they win."

Teddy Roosevelt:

• "Do what you can with what you have where you are."

Vladimir Nabokov:

• “Listen: I am ideally happy. My happiness is a kind of challenge. As I wander along the streets and the squares and the paths by the canal, absently sensing the lips of dampness through my worn soles, I carry proudly my ineffable happiness. The centuries will roll by, and schoolboys will yawn over the history of our upheavals; everything will pass, but my happiness , dear, my happiness will remain,in the moist reflection of a street lamp, in the cautious bend of stone steps that descend into the canal’s black waters, in the smiles of a dancing couple, in everything with which God so generously surrounds human loneliness.”

Voltaire:

• "People will continue to commit atrocities as long as they believe in absurdities."
• "God is a comedian playing to an audience that is afraid to laugh."

William Congreve:

• "Hell hath no fury like a woman scorned."

Woody Allen:

• "If you're not failing every now and again, it's a sign you're not doing anything very innovative."