In studying natural wisdom, Dr. Boland takes a look at how Aristotle defends the principle of non-contradiction, focusing on the great philosopher's treatment of the causes that prompted the ancients to deny or doubt it. Boland then examines human knowledge and the problems raised with regard to its truth and certainty, which in essence can be reduced to a denial of this fundamental principle of non-contradiction during the revolt from reason that inevitably followed the rejection of Christian Faith and the divine authority of Christ's Church.