One way of arguing for a first mover (or, if you will, a first accelerator), is to make an analogy with a lessee who rents from someone else who is not the landlord but who is instead a subletting lessee. The second lessee could likewise rent from one who is subletting rather than the landlord, etc. But in order for this series to be coherent, there must be a landlord, a non-leasing lettor. But that landlord could have come into this position at a determinate point in time. Hence this analogy, while clarifying the simultaneity of cause/effect by referring us to the lessor/lessee, is not perfectly analogous to the sort of first mover argument that one would use to argue for God's existence. Another (defective) way would be to argue that God is the first pusher in a mechanistic universe. Problem with this is that momentum needs no cause. So God is probably filling the gaps in this argument. The third, best way of arguing for a first mover is to argu...