The thing about happiness is that you only know you had it when it's gone.

Data abstraction is the reduction of a particular body of data to a simplified representation of the whole.

The greatest power is the ability to control your own emotions and desires.

我们每天支配的时间是有弹性的；我们感受到的激情会扩展它，我们激发的激情会收缩它；而习惯会填补剩下的部分。