Fair warning. If you are easily offended by the word shit. You've been warned. Oh and if you have some religious qualms don't keep reading.
The universal understanding of religion: Shit happens.
Catholicism: Shit happens and it's all my fault.
Judaism: Why does this shit happen to me
Daoism (Taoism): What is the sound of shit happening
Paganism: Does a bear shit in the woods? Yes, yes he does.
Buddhism: Clear your mind of all the shit happening.
Islam: Shit happens and Muhammad is its profit.
Confucianism: Confucius says "Shit happens."
Hinduism: Shit happens, over, and over, and over...
Agnosticism: Shit may or may not be happening
Atheism: Shit doesn't happen!
Shintoism: Shit happens in the sky and the grass and the water.
Rastafarian: We smoke dat shit!
And my personal favorite.
Jehovah's Witness: Knock, knock shit happens.
Oh and because it's an official religion in Australia, and unofficial in most other parts of the world.
The Belief in the Force (Work on that guys): Shit happens around us, and perpetrates us, surrounds us and moves us.