La realidad no es siempre probable, o verosímil.

The only limits that exist are the ones you place on yourself.

孔子说：“道听途说就是道德败坏。”

The artist must be a philosopher and a poet.

If we find the answer to why the universe exists, it would be the ultimate triumph of human reason – for then we would know the mind of God.

The pursuit of mathematical knowledge is a journey that never ends.

没有道德或不道德的书，只有写得好或写得差的书。