Deaf. There's too much in this world I still want to see. Besides, there are artificial means of hearing out there. Though that probably doesn't follow the spirit of the question.
Find proof that a god (any god) exists, but be the only one that knows it,
or,
Find proof that advanced alien life (of any form) exists, but not be able to share your evidence as everyone else finds it untrustworthy barring the most extreme of alien theorists.