most things cannot be enjoyed without friends,but reading.while sitting alone in our house,we can travel around the world,and we can understand the reason for thousand things.living in this age,we can talk with whom lived long long ago.although we may unwise,we can become the friends of the wise man.only books can make us pleasure.those who cannot enjoy themselves are the poor man,those who enjoys their obtation are the most happy to them.
个人见解,并不精确,请见谅