Mary Doria Russell said this quote

I believe in God the way I believe in quarks. People whose business it is to know about quantum physics or religion tell me they have good reason to believe that quarks and God exist. And they tell me that if I wanted to devote my life to learning what they've learned, I'd find quarks and God just like they did.

~ Mary Doria Russell

There are times...when we are in the midst of life-moments of confrontation with birth or death, or moments of beauty when nature or love is fully revealed, or moments of terrible loneliness-times when a holy and awesome awareness comes upon us. It may come as deep inner stillness or as a rush of overflowing emotion. It may seem to come from beyond us, without any provocation, or from within us, evoked by music or by a sleeping child. If we open our hearts at such moments, creation reveals itself to us in all it's unity and fullness. And when we return from such a moment of awareness, our hearts long to find some way to capture it in words forever, so that we can remain faithful to it's higher truth....When my people search for a name to give to the truth we feel at those moments, we call it God, and when we capture that understanding in timeless poetry, we call it praying.

~ Mary Doria Russell

...trust in God could impose an additional burden on good people slammed to their knees by some senseless tragedy. An atheist might be no less staggered by such an event, but nonbelievers often experienced a kind of calm acceptance: shit happens, and this particular shit happened to them. It could be more difficult for a person of faith to get to his feet precisely because he had to reconcile God's love and care with the stupid, brutal fact that something irreversibly terrible had happened.

~ Mary Doria Russell

He's not a bad guy, John. It's human nature. He wanted it to be some mistake I made that he wouldn't have made, some flaw in me that he didn't share, so he could believe it wouldn't have happened to him. But it wasn't my fault. It was either blind, dumb, stupid luck from start to finish, in which case, we are all in the wrong business gentleman, or it was a God I cannot worship.

~ Mary Doria Russell