Following Aquinas's argumentation, we will reasonably ask ourselves, at a certain point, what the cause of what was considered to be the First Cause is. However, with the temporal cause, we may not assume an extra cause, because there will have been no prior time at which this cause may have occurred. As such, this "definition implies that the universe cannot be caused to begin to exist since there is no earlier time at which the cause could occur."

Resuming, in order to reject the argument of efficient causation summarized by Aquinas, we would need to either assume that all objects are contingent (first of Russell's argumentations) or to assume that there was a temporal cause, in the sense that the First Cause simply could not have existed because there was no prior time.

Bibliography

1. Russell, Bertrand. Why I am not a Theist. On the Internet at http://jumper52.cjb.cc/russell.htm

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