"The past is a foreign country; they do things differently there."
过去是一个外国;他们在那里做事的方式不同。
The only limit to our realization of tomorrow will be our doubts of today.
The only way to change behavior is through manipulation of reinforcement contingencies.
与其因害怕可能发生的事情而怯懦地无所作为,不如以高贵的勇气冒险面对我们预期的一半的灾难。