Acts 12:9 And thus, after going out, he continued following, and yet he had not seen or perceived so as to know that the incident presently happening by means of the agent (messenger) is real, so he continued thinking (imagining; supposing) himself to be seeing a vision (effect of something seen).

JMNT⁽ⁱ⁾ ⁹ And thus, after going out, he continued following, and yet he had not seen or perceived so as to know that the [incident] presently happening by means of the agent (messenger) is real, so he continued thinking (imagining; supposing) [himself] to be seeing a vision (effect of something seen).