Leah Libresco, who’d been a prominent atheist blogger for the religion website Patheos, announced on her blog this week that after years of debating many “smart Christians,” she has decided to become one herself, and that she has begun the process of converting to Catholicism.

Libresco, who had long blogged under the banner “Unequally Yoked: A geeky atheist picks fights with her Catholic boyfriend,” said that at the heart of her decision were questions of morality and how one finds a moral compass.

“I had one thing that I was most certain of, which is that morality is something we have a duty to,” Libresco told CNN in an interview this week, a small cross dangling from her neck. “And it is external from us. And when push came to shove, that is the belief I wouldn’t let go of. And that is something I can’t prove.”

It is said that once you go black, you never go back. The same can be said of atheism: once you go there, there's no turning back. A nonbeliever who suddenly or finally changes his/her mind—atheism is wrong, an ape did create the universe—was never for a moment a nonbeliever. They aways believed. They not once felt to the core of their being the chill of this icy understanding: the universe is an impersonal process, humans are not special, nothing exists after life. When you feel how cold this is, you will know it is the truth. And once you know this truth, you will never be warmed and comforted by these old stories of men walking on water, healing the sick, and flying through the air.