5.1.1. Prime mover; the umoved mover
18.104.22.168. Some things move.
22.214.171.124. Everything moving is moved by something.
126.96.36.199. An infinite regression of movement is impossible
188.8.131.52. Therefore, there must be an unmoved mover of everything else.
184.108.40.206. The unmoved mover is God.
5.1.2. Efficient cause
220.127.116.11. Some things are cuased
18.104.22.168. Everything caused is caused by something else
22.214.171.124. An infinite regression of cause is impossible.
126.96.36.199. Therefore, there must be an uncaused cause of everything else.
188.8.131.52. The uncaused cause is God.
5.1.3. Contigency or being.
184.108.40.206. Some things exist and are contigent upon someone making the existence.
220.127.116.11. It is impossible for everything to be contigent, for then there would be a time when nothing existed; and so if there were nothing, nothing would exist now. That is, there is nothing to bring anything into existence. This is clearly false. Therefore, we have regressed contigency of existence back to God.