Life is a slope.As long as you're going up you're always looking towards the top and you feel happy, but when you reach it, suddenly you can see the road going downhill and death at the end of it all. It's slow going up and quick going down.
Behavior is not just a response to a stimulus, but is guided by expectations and purposes.
我不害怕跌倒,因为我知道我会重新站起来。
The laws of physics as we know them may be just a small part of a much larger set of laws.