Sustainability isn't just an option; it's our responsibility to future generations.

人们要求言论自由作为他们很少使用的思想自由的补偿。

The only limits you have are the limits you believe.

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.

书籍是通往我们内心平行宇宙的门户。