Story of time 

People really cannot compare with people, some people were born in Rome, some people to the adults are still climbing in the mountains. The cruel competition of the society is not the size of the age, but who first understand the routine and hidden rules, the competition is how many resources you can be used by you, early understand and late understand the fate is completely different. What is more cruel is that we know the routine, the hidden rules are touched after the reality, and it is too late.