Alien life forms exist outside the earth. Believe or not, it's still the quite mysterious question. This is the matter of belief,namely totally dependent upn your mind not based on practical scientific evidences. We already know about alien life forms through numberous scientific articles and stories involved. And each story has its uniqueness featured by additional exciting details. But do I believe that? My answer is both No and Yes. (50% for each of both)
-No,because I haven't seen the alien forms with my own eyes, but only hear lots of papers relating that.
-Yes,for I find myself that life is mysterious, and so many things still unanswered. It's the mystery that enables us to be persistent silent as dealing with something invisible or unknown to mankind. But, on the other hand, we hardly stay calm regarding discoveries and searches anything outside the earth.
You don't cope with whatever related to earth, with so many amazingly enigmatic things concerning our current life, how can you advance the complex questions outside of your own existence right in this earth?. Confucius rarely talked about evil spirits because " we havent yet dealt with earthly things, why we interested in ghosts and devils ? "
However, to my part, I think that if we are human that have life, our life would not stand alone. Why?
We have flesh and spirit encompasing our whole life, which makes us naturally feeling something utterly unexplained. With scientificaly inexplicable things giving no practical evidences, there will exists trust or distrust. I dont know how to express that in the practical term
That's the individual problem, which is the same as whether you believe or disbelieve certain supernatural power .