The key to successful identification is to find a model that is as simple as possible, but not simpler.
成功辨识的关键是找到一个尽可能简单但不过于简单的模型。
To be a philosopher is not merely to have subtle thoughts, nor even to found a school, but so to love wisdom as to live according to its dictates.
Do not live for others; live for yourself.
唤醒天才的是困难。
惩罚时不避忌权贵，奖赏时不遗忘地位低下的人。