Clergyman's

“The voice of the intellect is a soft one, but it does not rest until it has gained a hearing.”
– Sigmund Freud

“Nature shows that with the growth of intelligence comes increased capacity for pain, and it is only with the highest degree of intelligence that suffering reaches its supreme point.”
– Arthur Schopenhauer

“We all agree that pessimism is a mark of superior intellect.”
– John Kenneth Galbraith