This is what has been taught and what most believe, and what most expect to see of Jesus' second coming, as "coming in the clouds":
But this is what is actually written (Jesus speaking):"Now when He was asked by the Pharisees when the kingdom of God would come, He answered them and said, “The kingdom of God does not come with observation; 21 nor will they say, ‘See here!’ or ‘See there!’ For indeed, the kingdom of God is within you.” Luke 17:20-21
What most have missed in the "coming in the clouds" passage...is that it does not say "clouds" as in the sky-- but specifically, "in the clouds of heaven."