Sigmund Freud

 It is always possible to bind together a considerable number of people in love, so long as there are other people left over to receive the manifestations of their aggression. - Sigmund Freud

Albert Camus

"You will never be happy if you continue to search for what happiness consists of. You will never live if you are looking for the meaning of life." -- Albert Camus

Three more quotes from Camus:

"Where there is no hope, it is incumbent on us to invent it."

"Always go too far, because that's where you'll find the truth"

"The absurd is the essential concept and the first truth."

T. S. Eliot

“What we call the beginning is often the end. And to make an end is to make a beginning. The end is where we start from.” - T. S. Eliot