“A person who is never duped cannot be a friend.”

“Two persons cannot long be friends if they cannot forgive each other's little failings.”

Jean de La Bruyère (1645–1696) 17th-century French writer and philosopher

“A person who cannot imagine the future is a person who cannot contemplate the results of his actions. Some are thus paralyzed into inaction.”

Alan Lightman book Einstein's Dreams

“Never cease loving a person, and never give up hope for him, for even the prodigal son who had fallen most low, could still be saved; the bitterest enemy and also he who was your friend could again be your friend; love that has grown cold can kindle.”

Sören Kierkegaard (1813–1855) Danish philosopher and theologian, founder of Existentialism

“The only person who never makes mistakes is the person who never does anything.”

Denis Waitley (1933) American writer

“Silence is a true friend who never betrays.”

Confucius (-551–-479 BC) Chinese teacher, editor, politician, and philosopher

“A man cannot be said to succeed in this life who does not satisfy one friend.”

Henry David Thoreau (1817–1862) 1817-1862 American poet, essayist, naturalist, and abolitionist

“It's said a friend is a person who walks in when everyone else walks out.”

Melissa de la Cruz (1971) American writer

“Never say, and never take seriously anyone who says, "I cannot believe that so-and-so could have evolved by gradual selection". I have dubbed this kind of fallacy "the Argument from Personal Incredulity."”

Richard Dawkins book River Out of Eden

“person who cannot control his words shows that he cannot control himself, and is unworthy of respect.”

Robert Greene book The 48 Laws of Power