Collaboration and sharing of knowledge are essential for the advancement of science.

Gain weight and stay well.

The act of writing is an act of courage.

Core technologies cannot be bought; they must be developed independently.

我从十五岁开始致力于学习，三十岁便能自立于社会了，四十岁对各种事理不再迷惑不解，五十岁懂得了自然界的规律，六十岁对听到的事情能领会贯通，并能辨别是非真伪，七十岁时做事能随心所欲，但又不会超出礼法的规范。

学习理论中的一个关键见解是，假设类的复杂性对于泛化至关重要。