Acts 1:10
They were looking intently up into the sky as he was going, when suddenly two men dressed in white stood beside them — the white-clad figures are angelic interpreters of the event (cf. Mark 16:5, Luke 24:4), providing theological commentary on what the disciples witnessed. The sudden appearance (kai idou, behold) marks the divine puncture into earthly time. The disciples' upward gaze requires redirection toward their earthly mission.