Buddhism. I first learned about it when someone was discussing whether it's a religion or a way of life. They specifically mentioned that it doesn't necessarily prevent you from being Christian (which I was) at the same time.

3 years later and I disagree with that statement, to a certain extent. You could choose to ignore the "supernatural" parts of Buddhism and just learn from the lessons. But I think the more you learn, the more it just kinda makes sense.

For instance, buddhist believe in "re-incarnation" but there's a lot of debate about what that is. I prefer death and rebirth. Which I interpret as: I'm a different person than I was 10 years ago. The old me died and was reborn as what I am now.

Other things that I like about it: it is encouraged that you have skeptisicm about what you learn. I'm fact, you shouldn't just accept it because without questioning what your being told, you can not come to a true understanding and belief. The lessons all revolve around how to be a better person. How to achieve nirvana through your thoughts, actions, views, etc. Many of the principles were first introduced when buddha was alive 2500 years ago. Today, psychology studies have shown that many of them really do have long lasting, extremely beneficial effects. Think meditation and mindfulness (not necessarily invented by Buddhism, but popularized by it)

For me it really resonates. A lot of the things I care about are discussed. From mental health to treating life with respect to the environment to forgiveness. I also don't find much hipocracy.