It's plain hokum. If you can't convince 'em, confuse 'em. It's an old political trick. But this time it won't work.
Just as all motion is from an unmovable cause, so everything divisible is from an indivisible cause. However, this visible, corporeal world is, assuredly, of a divisible nature, since what is corporeal is divisible. Therefore, this world is from an earlier, indivisible Cause.