善学者尽其理，善行者究其难。
善于学习的人，能够透彻地知道事情的道理；善于实践的人，能够把事情疑难之处弄清楚。
在热量下降过程中，动力显然随冷热物体之间的温差增大而增加。
The historian must be a poet and an artist in order to give life to the dead bones of the past.
读书求明理，须让自己满意；与别人谈道理，须令别人佩服。
The future belongs to those who believe in the beauty of their dreams.
Love is the only sane and satisfactory answer to the problem of human existence.
我们称之为管理的大部分内容，实际上是让人们难以完成工作。