Spiritual is not necessarily religious. One can be religious without being spiritual or vice versa... Anyway that's a whole other discussion topic.
To expound on what I originally meant... Is comics that have deep themes... Doesn't matter what religion or ideology the author is trying to showcase. Questioning of society, politics, overall meaning of life, etc.
I personally am a spiritual Christian... But I do believe what the Bible says about reasoning together and how the truth will set you free.
I was born into a Catholic family... Became an atheist later... Then that didn't work out... Tried new age beliefs... Reiki... And all these "channelings" from the aliens... and a little bit of dabbling in witchcraft... Didn't work out either... And now I'm a spiritual Christian.
I don't believe in denominations... I'm not part of any big church cuz most of the time they teach the watered down gospel and/or justify their own sins... Another topic altogether...
Anyway I've always kept an open mind and I don't stop putting my faith under scrutiny and question. This is why I keep my ears open to multiple viewpoints out there.
Because at the end of the day, the truth shall prevail and the truth shall set you free. 