So, I question the author's motive? What is the underlying objective of the "Thomistic Philosophy Page"?
Is it an attack upon reason?
Quite the opposite. Aristotelian/Thomistic realism provides a rock-solid foundation for truth. If you've read Rand, you probably know that she claims to admire Aristotle. But she either rejected Aristotle's epistemology or ignored it. Aquinas' epistemology is based on Aristotle's epistemology.
Aristotelian/Thomistic realism solves the problem of the knower/thing known. Both Aristotle and Aquinas taught that in the act of knowing a thing, the form (see "Formal Cause" on linked page) of the thing becomes one with the mind, without the destruction of the form of the thing known.
A background in Aristotelian/Thomist terms is essential to coming to an understanding of this explanation.