Certification schemes are the floor, not the ceiling of responsible forestry practice.

To me programming is more than an important practical art. It is also a gigantic undertaking in the foundations of knowledge.

You take delight not in a city’s seven or seventy wonders, but in the answer it gives to a question of yours.

Success comes from focusing on what you can control and letting go of what you cannot.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

书是一颗只在别人胸膛里跳动的心。