The secret of joy in work is contained in one word - excellence. To know how to do something well is to enjoy it.
"To be hopeful in bad times is not just foolishly romantic. It is based on the fact that human history is a history not only of cruelty, but also of compassion, sacrifice, courage, kindness."
心理学必须基于可观察的事实，而非推测。
What can be said at all can be said clearly; and whereof one cannot speak thereof one must be silent.
