{As if the face of an angel} (h(9373)ei pros(9370)on aggelou).
Even his enemies saw that, wicked as they were. See  Ex 34:30 
for the face of Moses when he came down from Sinai ( 2Co 3:7 ).
Page quotes Tennyson: "God's glory smote him on the face." Where
were Peter and John at this crisis? Apparently Stephen stands
alone before the Sanhedrin as Jesus did. But he was not alone for
he saw Jesus standing at the right hand of God ( Ac 7:56 ). There
was little that Peter and John could have done if they had been
present. Gamaliel did not interpose this time for the Pharisees
were behind the charges against Stephen, false though they were
as Gamaliel could have found out.