教育学中的实验方法不仅是研究的工具，更是所有教育实践的基本原则。

The most valuable resource we have isn't in the ground - it's the people who show up every day to do the work.

Ingersoll's story of the man that went down from heaven on a reduced-rate excursion ticket good for 30 days --- and tried to sell his return ticket.

The psychologist must avoid all forms of mental chemistry.