There's nothing wrong with changing ones mind and beliefs even many times over. I often quote Alan Arkin from his short short and fabulous, "Out of My Mind (Not Quite a Memoir):

"I looked back and realized that for the first half of my life I’d been ready to change the world three times with three sets of beliefs, each one of which I’d outgrown and discarded, so it seemed a better idea to just shut up. I started to slowly let go of my needs for the rest of the world and began living more and more in my feelings and my intuitions and concentrating on the enormous faults within myself that needed addressing and correcting. As I did so, and it was a slow and painful process, I could see that whatever work I did on the inside was slowly taking root, making me saner, more patient, somewhat more compassionate and all of this began to affect a new view of the world which I tried hard not to concretize and make rules for. As a result, everything started to become more fluid, less frightening, and more surprising, both inside me and around me, and I started thinking maybe that was enough for a while. Belief systems, I started to realize, were wish lists. Things you’d like to be true. They were not immutable laws.”