The most disruptive ideas often seem absurd at first.
最具颠覆性的想法最初往往显得荒谬。
Mathematics is the poetry of logical ideas.
The moment eternal—just that and nothing more.
The history of philosophy is not, like the history of the sciences, to be considered as a mere chronological record of discoveries and errors. It is the history of the human spirit in its endeavor to understand itself and its relation to the universe.
The past is not a foreign land but our ancestral home.