1. Acts 12:9 (ESV)
  2. Exposition

What does it mean for Peter to think he was seeing a vision?

Acts 12:9 (ESV)

9 And he went out and followed him. He did not know that what was being done by the angel was real, but thought he was seeing a vision.

Peter does not fully realise what is happening. He thinks that he is having a dream as he slowly wakes from his sleep.