Thomas Aquinas' Five Reasons

<p>According to Aquinas, there are five ways we can demonstrate God's existence. We can argue:&nbsp;

(1) from motion to an Unmoved Mover;&nbsp;

(2) from effects to a First Cause;&nbsp;

(3) from contingent being to a Necessary Being;&nbsp;

(4) from degrees of perfection to a Most Perfect Being; and&nbsp;

(5) from design in nature to a Designer of nature (ibid., 1a, 2, 3).&nbsp;</p>

<p>

<b>Behind these arguments is the premise that all finite, changing beings need a cause outside themselves.</b>

Baker Encyclopedia of Christian Apologetics.</p>