"This life of yours which you are living is not merely a piece of the entire existence, but is in a certain sense the whole; only this whole is not so constituted that it can be surveyed in a single gl…"

"The number of children born to a marriage ought to be limited, and that a man who has already had some children should be sterilized."

"I am a physicist, not a philosopher. But I cannot help but think about these things."

"Consciousness is a singular of which the plural is unknown; that there is only one thing and that what seems to be a plurality is merely a series of different aspects of this one thing."

"The world is not a static place, but is constantly changing and evolving."