No, I don't believe that people's lives are determined by their zodiac sign because I think that zodiac signs are purposely very vague and they might say something that most people would have in common and some characteristics of.
Yes, I do believe in the idea of fate or destiny because I don't believe in such a thing as being random. In my opinion, I don't think that there is such a thing as random and I think that everything has already been predetermined for us; or as Shakespeare puts it "written in the stars". I believe that our lives have been determined already by a power greater than humans and that
any choice we make was the choice that we were supposed to make.