Atheism is not "a way of looking at the world". It is not an ideology or philosophy. It is a non-thing. It is a word made up by religious people for those of us who don't believe in their stories.
I don't have to proactively exercise non belief in a god any more than I have to put time and effort into not believing in fairies.
There is nothing for me to see or experience that I have to resist or deny. To believe in a god would take an act of will on my part.
Atheist is not a word I use to describe myself.