The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all.
技术只是一个工具。真正的挑战是明智地使用它。
There are tracts in my life that are bare and silent. They are the open spaces where my busy days had their light and air.
The mind is an active, dynamic process, not a passive receptacle.