The Focus on Immanent Activity in the Second Way

The Focus on Immanent Activity in the Second Way

After presenting the “first and more manifest way” of proving the existence of God by reason alone (without the aid of God revealing himself in Sacred Scriptures), in Summa Theologiae Ia, 2, 3, Saint Thomas Aquinas continues this project by turning in the “Second Way” to what he somewhat enigmatically calls “the nature of the efficient cause.” The greatest obstacle to understanding his Second Way, though, is determining precisely what Aquinas means by “the nature of the efficient cause” and “an order of efficient causes,” and how the Second Way is distinct from the First and Third Ways. This essay attempts to do so.

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