[He considers all of that for a moment. He can imagine this must be difficult for Aiba; he can't really relate well to what she's going to, but he does know he wants to try to help her feel better. So maybe...]

...Adaman told me a little bit about his god. His god wants us to live our lives to the fullest, because the time we have in this world is limited. We should spend what time we do have in the best way we know how, and we should do what we can for others and to make the world a better place. Be mindful, but not so much that it consumes everything you do. Learn from your mistakes, and make the best of your life moving forward.

I think that's something you can do, whether you believe in Almighty Sinnoh or not.