And their eyes were opened, and they knew him; and he vanished out of their sight.
All Commentaries on Luke 24:31 Go To Luke 24
Augustine of Hippo
AD 430
The Lord Jesus was made known, and after being made known he appeared no more. He withdrew from them in the body, since he was held by them in faith. That indeed is why the Lord absented himself in the body from the whole church, and ascended into heaven, for the building up of faith.