Purpose of Blogging

Sometimes I wonder why I am spending my time on the blogosphere. I keep writing random stuffs through which I don't have to carry any information to anyone. And I don't even think whatever I write here may prove to be useful for someone. But personally I was benefited a lot by several blogs. Those sincere bloggers are really doing a great job by sharing their ideas, opinions related to diverse fields. Specially the physics stuffs they write are very recent as well as significant. Whereas I use my blog as an open diary. I just write whatever I learn, whatever I do and all. I don't even know if they are worth writing, but it seems from a couple of months it has become one of my hobbies. I hope after spending another two-three years on the blogosphere I would be able to write some constructive things based on my own ideas.