"The pursuit of knowledge is not just a journey of the mind, but also of the heart."
The best time to plant a tree was 20 years ago. The second best time is now.
所有复杂行为都可以简化为更简单的刺激-反应单元。
过去是一个陌生的国家;他们在那里做事的方式不同。
一个人的心灵美好,是不可能掩蔽的,这会表现在形体容貌上,也能在神色上看得出来。