数据告诉你发生了什么，但只有直觉能告诉你为什么。

'Jeff, what does Day 2 look like?' 'Day 2 is stasis. Followed by irrelevance. Followed by excruciating, painful decline. Followed by death. And that is why it is always Day 1.' To be sure, this kind of decline would happen in extreme slow motion. An established company might harvest Day 2 for decades, but the final result would still come.

水的源头如果浑浊，那么水流就不可能清澈；言行不讲信用的，名声必然受到损害。