The only thing a writer really needs

I have found, when talking to my fellow writers, that a lot of them have to really go out of their way to acquire inspiration. Personally, I feel that the only thing a true writer needs is a vivid imagination. Of course, other factors also play into effect, dedication, will power, and so forth. But, one always has to remember that the creation process comes from within, never from outside sources. So when I hear that someone has to be around priceless works of art or reside in multi-million dollar mansions to come up with anything, It borderlines on absurdity.