Thomas Aquinas

===Epistemology===
{{see also|Double truth}}

Thomas Aquinas believed "that for the knowledge of any truth whatsoever man needs divine help, that the intellect may be moved by God to its act."<ref>{{cite web |url=http://saints.sqpn.com/saint-thomas-aquinas/ |title=Blog Archive " Saint Thomas Aquinas |date=22 October 1974 |publisher=Saints.SQPN.com |access-date=17 January 2010}}</ref> However, he believed that human beings have the natural capacity to know many things without special [[divine revelation]], even though such revelation occurs from time to time, "especially in regard to such (truths) as pertain to faith."<ref name="Summa I-II Q109a1">{{cite web |url= http://ccel.org/ccel/aquinas/summa.FS_Q109_A1.html#FS_Q109_A1-p9 |title=''Summa'', I–II, Q109a1 |via =ccel.org |access-date=25 March 2012}}</ref> But this is the light that is given to man by God according to man's nature: "Now every form bestowed on created things by God has power for a determined act[uality], which it can bring about in proportion to its own proper endowment; and beyond which it is powerless, except by a superadded form, as water can only heat when heated by the fire. And thus the human understanding has a form, viz. intelligible light, which of itself is sufficient for knowing certain intelligible things, viz. those we can come to know through the senses."<ref name="Summa I-II Q109a1" />