Is There Sufficient Reason?

Copplestone: God is his own sufficient reason, but he is not cause himself. An adequate explanation must ultimately be a total explanation to which nothing further can be added. If it's caused or explained, then something independent exists beyond the series. But adding up things that are dependent and have some explanation of these things doesn't yield an explanation itself. So if you add up contingent being to infinity, you still get contingent beings, not a necessary being. I see no reason whatsoever pose that the toto has any case lik so hapen. And i don't believe that the infinity of the series of events would be in the slightest degree relevant to the situation. This is one kind