Let them alone: they are blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.
All Commentaries on Matthew 15:14 Go To Matthew 15
Rabanus Maurus
AD 856
They are blind, that is, they want the light of God’s commandments; and they are “leaders of the blind,” inasmuch as they draw others headlong, erring, and leading into error; whence it is added, “If the blind lead the blind, they both fall into the ditch.”