“Among beings there are some more and some less good, true, noble, and the like. But more and less are predicted of different things according as they resemble in different ways something which is the maximum, as a thing is said to be hotter according as it more nearly resembles that which is hottest; so that there is something which is truest, something best, something noblest, and, consequently, something which is most being, for those things that are greatest in truth are greatest in being, as it is written in Metaph, ii.
Now the maximum in any genus is the cause of all in that genus, as fire, which is the maximum of heat, is the cause of all hot things, as is said in the same book.
Therefore there must be something which is to all beings the cause of their being, goodness, and every other perfection; and this we call God.”
– The Path from Science to God, Roger Nesbitt, Faith Pamphlets, cf. St Thomas Aquinas, Summa Theologica