Mental activity is the organism's way of engaging with the world.
心理活动是有机体与世界互动的方式。
数学的本质不是使简单的事情复杂化，而是使复杂的事情简单化。
The most perfect education, in my opinion, is such an exercise of the understanding as is best calculated to strengthen the body and form the heart.
Continuous effort - not strength or intelligence - is the key to unlocking our potential.
The editor's job is to make the director's vision come alive.