Psychology should be the science of mental life, both of its phenomena and of their conditions.
心理学应该是关于心理生活的科学，包括其现象及其条件。
反馈是一个强大的概念，在自然系统和技术系统中被广泛使用。
The true investor scarcely ever is forced to sell his shares, and at all other times he is free to disregard the current price quotation.
"Books, which we mistake for consolation, only add depth to our sorrow."
"The value of a man should be seen in what he gives and not in what he is able to receive."
文学是人类的记忆，没有它，我们就会迷失。