A solid talk by Dr. Feser, a well respected Thomist. He doesn't lay out the first mover argument in the same way as Aristotle or Thomas Aquinas, but it is still in line with their thinking. I would summarize it, but he lays out the argument much better than I could. That being said, I am happy to defend what he said.
I would suggest listening to it in the car or something. If you are an atheist because you haven't seen any good proof for the existence of God, then this video might change that.
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