We are extrapolating machines in a world where nothing too good or too bad lasts indefinitely.  When you’re in the middle of a powerful trend it’s difficult to imagine a force strong enough to turn things the other way.

One of the things about the Valley that I find outsiders miss the most is that it feels like it's all moving so fast, and yet, any of the important companies or any of the important products take a decade or more to build. Everything important takes a long time, so a lot of it actually feels quite slow. Long-term orientation is absolutely necessary... See more

In other words, the faster you try to change, the more likely you are to backslide. The very pursuit of rapid change dials up a wide range of counteracting forces which are fighting to pull you back into your previous lifestyle. You might be able to beat equilibrium for a little while, but pretty soon your energy fades and the backsliding begins.