Impossible is nothing.
There have been many religious leaders who made a difference to their respective communities, and there are a few who have been questioned for the way they have carried out their roles as representatives of their religious beliefs.
From time immemorial, a vast majority of humans have been in need of guidance. Now, guidance did not come from some alien source but from a few humans who attained mastery over belief, thought and themselves. Since the spirit formed the core of their beliefs, they came to be known as spiritualists.