Ideas for my first tattoo?

I currently don't have any but I have been always wanting one since I was 13, I'm 20 now. I want a tattoo that would symbolize my transition from theism to atheism. I used to be a die-hard muslim but I finally realized the truth. And thats what I want my tattoo to symbolize... truth. This was the single most important event in my life, because after I stopped believing, I felt such an uplifting feeling, like I was born again. I really don't know what I want and I'm open to practically anything so please give me some creative ideas! Thanks!