Why atheism always has a burden of proof

[Sword of Christ]

I don't see how this is true, or how your brain works.

You can think of it in terms of how a Buddhist would think of attachment but not the same degree in that you have to detach yourself of these pleasures entirely or live a life of austere asceticism. In Christianity the world being a creation of God isn't a thing to despise but it isn't a thing to worship either.