The world is paved with good intentions; the road to Hell has bad epistemology mixed in.
I think the original is instrumentally more useful. On hearing "the road to hell is paved with good intentions", one of my reactions is "I have good intentions, I'd better make sure I'm not on the road to hell". On hearing your version my first reaction is "whew, this doesn't apply to me, only to those people with bad epistemology".
Here's the new thread for posting quotes, with the usual rules: