The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.

If your goal does not have a schedule， it is a dream.

The study of mathematics is the indispensable basis for all intellectual and spiritual progress.

翻译：阐述了通晓事物之道的方法，即审视其构造并专心运用。

同一性的概念并不是我们从经验中学到的概念。

我不害怕犯错。我害怕不去尝试。