O see ye not yon narrow road,

So thick beset with thorns and briers?

That is the path of righteousness,

Though after it but few enquires.

And see ye not that braid braid road,

That lies across that lily leven?

That is the path of wickedness,

Though some call it the road to heaven.

http://www2.open.ac.uk/openlearn/poetryprescription/thomas-the-rhymer.html