"I still live, I still think: I..." - Quote by Friedrich Nietzsche

“The finest and healthiest thing about science is, as in the mountains, the brisk air blowing around in it.--The spiritually delicate (such as artists) shun and slander science owing to this air.”

“Profundity of thought belongs to youth, clarity of thought to old age.”

“When marrying, ask yourself this question: Do you believe that you will be able to converse well with this person into your old age? Everything else in marriage is transitory.”

“Don't seek more days in your life but more life in your days.”

“I am content in my later years. I have kept my good humor and take neither myself nor the next person seriously.”

“Age considers; youth ventures.”

“Profundity of thought belongs to youth, clarity of thought to old age.”

“Just because as human beings, what we can't have is what we reply in our head over and over again before we go to sleep.”

“Action is no less necessary than thought to the instinctive tendencies of the human frame.”