The new physics, especially the new quantum physics, is more startling than most realize.
To a certain extent, being an atheist means coming to grips with evidence that is more bizarre and seemingly fanciful than the idea of a supreme being.
For instance -- particulate consciousness. Gravity waves being broadcast back in time so that they effect distant particles in the current moment. Good lord (!), what about the idea that the universe is composed of a single electron?
It's important to be an atheist that explores. And a lot of new science suggests that, even though there may be no afterlife, it's possible that that writer's father is in fact always alive. And that his consciousness may effect events elsewhere along the timeline that have happened before or after his 'death'.
Just saying. It's a weird goddamned universe. Atheism doesn't mean making it simple and dreary and matter-of-fact. A 'God' must exist in some universe simply because the concept is imaginable. Everything that is imagined exists somewhere in some universe in some part of the timeline.
These word I'm writing are probably causing ripples in some distant future or past place. Atheism means refraining from the Hiding humans do, through whatever means, from the wildly disturbing and often terrifying truths of our existence.
It's important for atheism to be more than the opposite of religion. It is indeed far more than that.