Story of time 

Cognition to reach a certain height, to be empathy. When you stand in the valley, you only see the top of the mountain, and the sun and moon of the disc, which is not clear and clear, even in a state of fantasy and hazy. When you climb to the top of the mountain, you will see more scenery, a bigger world, a better cultural landscape and stories, and this is the main way to improve your knowledge, which means that you can be more tolerant and understanding, including the replacement of others, you can do it. Empathy is a sign of advanced life, but also the witness of cognition and understanding.