To answer the question the OP had made. Yes, sometimes I doubt my own beliefs from time to time and think "What if X is really true?". But that's generally because I have a hard time trusting and believing anything in this world often times.
I mean, I believe in the universe and it being one collective creation of everything that goes along within it. And I believe in the Universe's overall neutrality, that everything just happens and there is no good or evil until man decides so. But every now and then I have to ask myself whether or not I still believe that, because I've gone through multiple changes in the past 6 years in terms of belief systems.