It is futile to demand an a priori proof of the existence of objects which are not immediately ‘given’.

Common sense tells us that performance comes and goes, but costs go on forever.

"Writing is a way of thinking, a way of understanding the world."

要真正理解宇宙，我们必须首先理解我们理解的极限。

——1920年1月为《大光报》年刊题词

I always cheer up immensely if an attack is particularly wounding because I think, well, if they attack one personally, it means they have not a single political argument left.