"It's a set of beliefs that a person holds to be the truth, without proof."
Wrong. Church goers believe there is proof. Atheists certainly belive there is proof.
You're wrong in the fact that you think Artorius is wrong. Christian's (or church goer's as you say, which has an ironic truth over using "christians") entire belief system is based on FAITH. Faith, simply put, is believing without seeing. A very large portion of their beliefs have no physical or historical proof, yet there are still some which have historical proof.
You're right that they believe there is proof, however.. except it's not the conventional proof you're thinking of. They see proof in nature, and in everything around them.. they believe that the beauty, complexity, and balance of everything in existance is proof enough that a higher entity (or a god) exists. They call it proof, but it's more of a logical assumption.
I thought "church goers" was ironic because a good amount of people who attend church do it for one of the following reasons:
1.) Status
2.) Forced by someone/something
I think it's stupid to be an athiest for many reasons. If I were an athiest, I would have killed myself a long time ago.
Many athiests have gone to church and were turned away because honestly, some of it seems ludacris. I was turned away from church for the same reason, but I'm not an athiest.. I decided to read the bible on my own and come to my own conclusion about how I should live my life, and what I should believe.. and even if I ended up not agreeing/believing it, the bible is an amazing book whether you choose to believe in it or not.
If you use it as a guide, I gaurantee that your life will be better than if you hadn't. It truely is an amazing book.. there is more knowledge and wisdom in it than in anything iv'e ever come across in my life.