若是有足够的空间，婴儿会爬行去抓取东西。

The interest of the behaviorist in man's doings is more than the interest of the spectator—he wants to control man's reactions as physical scientists want to control and manipulate other natural phenomena.

The biggest risk is not taking any risk... In a world that's changing really quickly, the only strategy that is guaranteed to fail is not taking risks.

编程的艺术是组织复杂性的艺术，是掌握多样性并尽可能有效地避免其混乱的艺术。