最好的肥料？是农民田间的足迹。

"In the midst of winter, I found there was, within me, an invincible summer."

The human being cannot live in a condition of emptiness for very long: if he is not growing toward something, he does not merely stagnate; the pent-up potentialities turn into morbidity and despair, and eventually into destructive activities.

学校应该是一个微型社区，一个萌芽中的社会。

白天从妻子儿女的反应来省察自己的行为以看其是否诚信；夜晚由梦境情况来考验自己的志气，以知道其是否坚定。

The lab notebook is a scientist’s most honest companion.