The answer
A human cannot see the angels as they are with his physical eyes but can only see them by God’s permission, as in the case of Gehazi, Elisha’s disciple, who saw an angelic army surrounding and defending them (2 Kings 6:17). For our benefit, God may also allow even animals to see angels as in the case of Balaam’s donkey (Num. 22:26–31).
Fr. Tadros Yacoub Malaty