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Linusthe2nd
Guest
A. It is perfectly legitimate to drop Celesial Mechanics from the argument. Thomas did it himself in the S.T. form of the argument.If you say so.
A few comments using your numbers:
- I think unless Thomas specifically retracted on celestial mechanics it would be against his intentions to remove it. Also Iâve previously been told (by another poster) that the ST version is too simplistic and is defeated by the principle of inertia (although it turned out the longer version is too).
B. In what way is the argument in the S.T. too simplistic. These judgments must be proven, not just reiterated, because some folks view everything about any of Thomasâ " proofs " as invalid.
C. The principle of the Law of Inertia has no adverse effect on the First Way
- Firstly because we can just drop all consideration of it. The argument only has to be true in one instance and we have arrived at the Unmoved Mover, which is the only object of the argument. Once we have demonstrated the necessary existence of the Unmoved Mover, we have arrived at the existence of a being which can only be the Christian God.
2. Secondly, there is no reason not to consider a propelled object having mass as being moved from the actual state of non-moving to a state of moving, which it possessed only potentially before being acted on by an incidental agent having the power to actualize this potential. - Thirdly, there is no reason not to imagine that the acting agent has not activated two potentialities in the object having mass. It set it in motion and, secondly, it activated the objectâs nature of mass, which is to empower the object to continuous motion until acted upon by a superior opposing agent. And in this second actuation we may be bumping into the sustaining causality of the Unmoved Mover.
A. Thomas does not exclude the kind of self-motion wherein one part of a being ( substance
- Yes it does, for Thomas says âNow whatever is in motion is put in motion by anotherâ. Also thereâs no such thing as substance or essence, thatâs part of the discredited physics.

The same could be said of human activity in general or the activity of any living thing. One could even say it of the interior activity of all the elements on the periodic table. They are changing because of the interior activity of their natures. This is most notable in the atomic elements.
What Thomas was saying was true enough in his day, he certainly knew nothing of the natural degeneration of the various elements.
So one would have to make allowances for that type of change and just say that changes
caused by the spontaneous activity of inner nature of a thing instantiate the point where the Unmoved Mover is acting directly on the potential of a being. In other words we have arrived at the Unmoved Mover acting on nature, by sustaining, here and now, the spontaneous activity it bestowed upon these natures at creation or through evolution.
The kind of self movement it excludes is the kind where something like a lump of coal would change itself into a horse or a lump of gold.
B. Substance and essence have not been displaced by modern science ( except in your " humble " opinion ). If you are going to say that, you have to prove that it is so. It would be more proper to say that today we have broadened the application of substance and essence to include the meanings of what science discusses. But the use of the terms are still valid in philosophy and common usage. Aristotle and Thomas closely defined them. Science assumes their validity or science would be impossible.
And I better stop here for now.
Linus2nd