天堂的合唱队和地球上的一切物质——总之,构成世界的所有物体——都没有存在,没有心灵。
The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.
我知道要达到顶峰需要付出多少努力,但保持在那里需要更多。