When I was five I belived in the Santa-claus.
Did not change much for me to find out that it does not exist.

Now, as a pure atheist, I like the idea that I cant be controlled by others
in my thinking. Mind Controll for example by stating some new interpretations (politically motivated)
of stuff people
wrote 3000 years ago that had totally other problems.

God cant be disproven, as the people who are religious take this as a
belive and not a scientific fact. Cant disprove a belive on something that cant
be registered.
Lets say you belive, you dog ate the cookie. But there is no cookie anymore, and
the dog does not talk. There is little options to disprove your belive that the dog
ate the cookie.