In some way, always. Even if my comics aren't explicitly political in their text, my political views and beliefs inform the way I tell stories, and the ideals I choose to present. Even when I'm not consciously attempting to do it, it happens anyway. You won't find me doing a positive spin on a belief I don't share, for example. And some things feel natural and obvious to me because of my personal beliefs (women in unquestioned positions of authority, just to name one), so they end up in my stories without me even having to think about them.
On the other hand, there are definitely things that are in my comics that I don't personally believe. I have plenty of characters that are religious and believe in the supernatural, whereas in real life I am an atheist who has no belief at all in the existence of supernatural creatures.
I just happen to find folklore and folk-beliefs a fascinating aspect of human psychology, so it ends up in my stories.