nothing' personal

Why "Nothing's Personal"?
I believe personal is just for a person(it may be yourself or just any particular person) since this is for all,so......

As the age is progressing,quality of friends i have is trimming. This makes me to enter the world of blogging to share the views and thoughts etc. Also i have heard that writing helps in destressing whether it's read or understood by anyone. I guess that's the reason we all are here.