which source is more important ? And why?

I think the most important sources is Internet for me .
Because I only got knowledge from school before ,
so the Internet let our life become more convenient .
For example , first , we can use Internet to shop at home .
Second , if I want to know something , I can use Internet to get the answer .
Third , we can use Internet to send homework for teacher , it can let us to reduce some time and paper to waste .
Fourth , the Internet is very popular tool , everyone can easy to use it .
Finally, Internet let our not only get knowledge but also give convenient lives .