Software is under a constant tension. Being symbolic it is arbitrarily perfectible; but also it is arbitrarily changeable.

I’m focused on what I need to do to be successful.

You can’t go back and change the beginning, but you can start where you are and change the ending.

数学之美在于它能够揭示现实的隐藏结构。

The only way to learn a new programming language is by writing programs in it.

Facing challenges requires courage to overcome difficulties and turn crises into development opportunities.