Q: What qualification do you have to say what you do?
A: My life is my qualification.
Q: What if you are wrong? Why should I believe in what you say?
A: Who ever asked you to believe? Of what use is belief? I don't ask you to believe, but to investigate, and then to know. The only belief I ask of you is belief in reason. Is this too much to ask? Enlightenment is not attained through belief.