Wiktionary
the road to hell is paved with good intentions
prov. Well-intended acts can lead to disaster.
Wikipedia
Usage examples of "the road to hell is paved with good intentions".
You could tell me more about how the road to Hell is paved with good intentions.
He knew as well as we in our own world do that the road to hell is paved with good intentions-but he also knew that, for human beings, good intentions are sometimes all there are.
While evidence says that the road to Hell is paved with good intentions, they're probably all on first steps.