That's the pessimist route. I've also heard that God is in the details.
Then again, I prefer the following sayings:
The road to Hell is paved with good intentions and mortared with blood.
If you go with God, the streets will be cobbled with the bones of your enemies. If not, then it will be with yours.
I bow to a God I've never seen, but I know he's always on my side.
If you spread your love, you are an agent of the devil. If you take up the sword, you are truly doing righteous work.