心理过程因其目的而存在。
Mental processes exist because they serve a purpose.
To understand the arithmetic of algebraic varieties is to understand the symmetries hidden within them.
要么忙着活，要么忙着死，人只有两种选择。
Those who deny freedom to others, deserve it not for themselves; and, under a just God, can not long retain it.
The stock market is a device for transferring money from the impatient to the patient.
The best way to have a good idea is to have a lot of ideas.
