This lecture discusses key ideas from the Medieval philosopher, theologian, and Dominican friar, Thomas Aquinas, and focuses on his Summa Theologiae, Prima Pars, q. 2.

It focuses upon his discussion in article 2, bearing on whether God's existence can be proven or demonstrated by rational means at all. Thomas offers us five ways to argue for God's existence. The second way focuses on efficient causality, and argues that God is the First Cause.

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You can find Thomas Aquinas' Summa Theologiae online here - www.newadvent.org/summa/