“Combinatory play seems to be the essential feature in productive thought — before there is any connection with…”

“We must build a kind of United States of Europe.”

“Do not deny the classical approach, simply as a reaction, or you will have created another pattern and…”

“The unnatural and increasingly rapid growth of the feeble-minded and insane classes, coupled as it is with steady…”

“The longer you can look back, the farther you can look forward. This is not a philosophical or…”

“Man is the only one that knows nothing, that can learn nothing without being taught. He can neither…”