The most profound technologies are those that become invisible because they are so deeply embedded in our lives.

种树的最佳时间是20年前；第二好的时间就是现在。

The only limits that exist are the ones you place on yourself.

I don't count my sit-ups. I only start counting when it starts hurting.

Use a password manager: Safer， easier， better.

The mind is a dynamic system of interrelated processes.

用户体验差1%，在规模化后就是100%的灾难。