For in him we live, and move, and have our being; as certain also of your own poets (poietes) have said, for we are also his offspring.
The first part of the sentence may be referring to us being in Christ presently, but to live, move and have our being sounds more like us in our entirety and is more consistent with us literally being inside God, and this is alluded to by declaring us his offspring.
Stephen E Dill in his book ‘’Nobody wrote this book’ {1} demonstrates that ‘The Apostle Paul knew all about the Unknown God, and he used his knowledge of Greek philosophy, theology, and science as a chance to share the Gospel of Jesus Christ
Paul thus knew about these Greek philosophers and the text describes how some of them (poets or ‘doers’) knew of this indwelling. But the main point is this was before Christ gave us the ability to do it in a different way after his resurrection . So we had our ‘being’ in God beforehand.Act 2:1
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And when the day of Pentecost was fully come, they were all with one accord in one place.
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Unchecked Copy Box Act 2:2
And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting.
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And there appeared unto them cloven tongues like as of fire, and it sat upon each of them.
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Unchecked Copy Box Act 2:4
And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance