All children's education must follow a principle, that is, to help children develop physically and mentally.
儿童的一切教育都必须遵循一个原则，即帮助孩子身心自然的发展。
心理学是科学，教学是艺术；科学永远不会直接从自身产生艺术。
数学的本质不是使简单的事物复杂化，而是使复杂的事物简单化。
写作是夺回时间的一种方式。
言语是行动的影子。
The circumstances of the world are continually changing, and the opinions of man change also; and as government is for the living, and not for the dead, it is the living only that has any right in it.
衡量农民成功的真正标准不仅仅是每英亩的产量，还有为子孙后代留下的遗产。