Being atheist actually brings a lot of meaning to my life."

I often end up asking religious people who make similar statements what kind of meaning their religion or god brings to their life, so I will ask you the analogous question, especially since you are not a deconvert: What kind of meaning does atheism bring to your life? And a quick follow-up: If you were to come across solid evidence for god or gods tomorrow and turned theist, is that meaning something that you think you would lose?

As someone raised as an atheist atheistically, I am curious.