The biggest risk is not taking any risk.

文明就像一层薄冰，漂浮在混乱与黑暗的深渊之上。

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.

在背后夸奖别人。这会传回到你自己那里。