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.

音乐的美丽之处在于它对不同的人可以有不同的意义。

在变革的时代，学习者将继承地球，而知晓者会发现自己装备精良却面对一个不复存在的世界。