Did he really? Man, that's weird!
Rand attempted to secularize that, ignoring Aristotle and the categorical logic she claimed to base her philosophy upon.
Considering that she rejected most (all?) of Aristotle's fundamental teachings, it's hard to understand how she thought of herself as an Aristotelian. Aristotle was far from a materialist.
The greatest of philosophers was Moses, from whom we get the idea that individual rights are not subject to the whims of an earthly monarch...
Interestingly, even Moses didn't understand the philosophical significance of God's name which was revealed to him: "I am who am." The idea that God's nature is to exist was not fully realized until the Scholastic era, many centuries after Christ's death.
God's name has special significance regarding the inspired nature of Scripture, since it seems to be highly improbable that an unlearned nomad like Moses would make such a profound philosophical breakthrough --a breakthrough that would not be fully understood for over a thousand years into the future.
Moses was hardly unlearned, he could have been Pharaoh and was well educated relatively much more than others of his day. Moses was a warrior philosopher. (Socrates was also a warrior.)
But, Moses was just a man and could not have known everything.