At the same time spoke the LORD by Isaiah the son of Amoz, saying,
Go and remove the sackcloth from off your body, and put off your shoes from your feet.
And he did so, walking naked and barefoot.
All Commentaries on Isaiah 20:2 Go To Isaiah 20
Ambrose of Milan
AD 397
That it may be more fully clear that prophets look not to themselves or what lies at their feet but to heavenly things, Stephen, when he was being stoned, saw the heavens open and Jesus standing at the right hand of God. Then he did not feel the blows of the stones, he did not heed the wounds of his body, but, fastening his eyes on Christ, he clung to him. So, too, Isaiah did not notice his nakedness but made himself the instrument of God’s voice, that he might proclaim what God spoke within him.