“And all that sat in the council, looking stedfastly on him, saw his face as it had been the face of an angel.”
King James Version (KJV)
6:15 As the face of an angel - Covered with supernatural lustre. They reckoned his preaching of Jesus to be the Christ was destroying Moses and the law; and God bears witness to him, with the same glory as he did to Moses, when he gave the law by him.
Ac 6:15 Looking steadfastly on him. "Fastening their eyes on him" (Revised Version). To see what effect the charges had on him. One of those who thus looked was Saul of Tarsus. It was probably from him that Luke obtained his account of this trial. As it had been the face of an angel. His face was radiant, either with his own divinely inspired peace and joy, or shining with a supernatural splendor. I incline to the first view, for had the latter been the case it would have awed the Sanhedrin, and probably suspended their proceedings.