Some quotes

Dalai Lama
"Our prime purpose in this life is to help others. And if you can't help them, at least don't hurt them."
"In the practice of tolerance, one's enemy is the best teacher."
"We can never obtain peace in the outer world until we make peace with ourselves."
"People were created to be loved, and things were created in order to use them. The world is in chaos because everything is the opposite."
"Remember that what you want is not always what you really need."
"When a person thinks that everything is going wrong, something wonderful happens in his life."

Mahatma Gandhi
"There is a sufficiency in the world for man's need but not for man's greed."

Mark Twain
"It's better to keep your mouth shut and appear stupid than open it and remove all doubt."

Michel Foucault
“People know what they do; frequently they know why they do what they do; but what they don't know is what what they do does.”

M. M. Zhvanetskiy
"Never exaggerate enemies' stupidity and friends' loyalty."
"If you are told that you are a multi-faceted personality - do not flatter yourself. Maybe they have in mind, you are bastard, asshole and parasite at the same time."
"If you argue with an idiot, you are most probably doing the same thing he does."
"Alcohol in small doses is harmless in any amount."
"Thinking is so difficult, so most people judge."

John Lennon (not proven)
“When I was 5 years old, my mother always told me that happiness was the key to life. When I went to school, they asked me what I wanted to be when I grew up. I wrote down ‘happy’. They told me I didn’t understand the assignment, and I told them they didn’t understand life.”