The psychologist must avoid all teleological interpretations.
学习数学的唯一方法就是做数学。
Careless words bring suffering, while gentle words bring peace.
The beauty of physics lies in its ability to explain the complex with simple principles.
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.