I'm catholic, and I find that aikido coincides with my religious beliefs quite nicely.
Going about my business not being paranoid, but more aware of my environment, allows me to function at a more relaxed level. This allows me to be nicer to people.
Aikido also puts into perspective what things are worth fighting for. I let a lot more things slide now, but I'm more assertive with the things that matter. When people know what you're about it makes it easier for them to function too.