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.

The secret of joy in work is contained in one word - excellence. To know how to do something well is to enjoy it.

I'm not where I want to be, but I'm not where I used to be.

The best armor of old age is a well-spent life perfecting it.

一个组织的学习质量决定了其改进的质量。