Aquinas's Proofs 1 - FIRST MOVER:
Some things are in motion, anything moved is moved by another, and there can't be an
infinite series of movers. So there must be a first mover (a mover that isn't itself
moved by another). This is God. 2 - FIRST CAUSE: Some things are caused, anything caused
is caused by another, and there can't be an infinite series of causes. So there must be
a first cause (a cause that isn't itself caused by another). This is God. 3 - NECESSARY
BEING: Every contingent being at some time fails to exist. So if everything were
contingent, then at some time there would have been nothing -- and so there would be
nothing now -- which is clearly false. So not everything is contingent. So there is a
necessary being. This is God. 4 - GREATEST BEING: Some things are greater than
others. Whatever is great to any degree gets its greatness from that which is the
greatest. So there is a greatest being, which is the source of all greatness. This is
God. 5 - INTELLIGENT DESIGNER: Many things in the world that lack intelligence act for
an end. Whatever acts for an end must be directed by an intelligent being. So the world
must have an intelligent designer. This is God.
This question will
get you more response if you put it on the discussion board instead of posting it here.
I've included the proofs above, and just off the top of my head, I would say that his
arguments are cyclical and they seem paradoxical. However, on closer look, he is using
much of what science uses today to prove certain laws. For instance, for every action
there is an equal reaction. Aquinas says essentially the same thing in Proofs 1 and 2.
Proof 3 also seems true via circular logic. There has never been "nothing" unless you
believe in the Big Bang theory, but even so, since the "bang" there has never again been
absolutely nothing. We have also assigned a hierarchy to living things in the
universe. Is it not true that we consider humans to be above all other living things on
earth? What about living things not on the earth? Are they above us? I think Aquinus
agrees there are, and he defines this as God. In addition, Aquinas believes that there
is an intelligent being who created all life. How else can you explain the complexities
of the human body, the ecosystem, the solar system, and the way life works in general on
this planet? Of course, Aquinas didn't live to see the harm human have caused to earth
with all of our factories, pollution, and non-green living, either, although I doubt
that would change his mind as to the existence of
God.