If you double the number of experiments you do per year, you're going to double your inventiveness.

心理学唯一有效的数据是受过训练的观察者的报告。

The longer I live the more I see that I am never wrong about anything, and that all the pains I have so humbly taken to verify my notions have only wasted my time.

食欲，对食物的渴望，是胃腺持续而强大的刺激物。

教师必须具有健康的体魄，农人的身手，科学的头脑，艺术的兴味，改革社会的精神。