The problem with Aquinas and most of Western Theology is that it is based solely on Aristotelian logic, rather than revelation and experience of the divine energies as the Orthodox Church Fathers teach.
...And this precisely is the work of Orthodox theology. When referring to Orthodox theology, we do not simply mean a history of theology. The latter is, of course, a part of this but not absolutely or exclusively. In patristic tradition, theologians are the God-seers. St. Gregory Palamas calls Barlaam a theologian, but he clearly emphasizes that intellectual theology differs greatly from the experience of the vision of God. According to St. Gregory Palamas theologians are the God-seers; those who have followed the "method" of the Church and have attained to perfect faith, to the illumination of the nous and to divinization (theosis). Theology is the fruit of man's therapy and the path which leads to therapy and the acquisition of the knowledge of God.
Western theology however has differentiated itself from Eastern Orthodox theology. Instead of being therapeutic, it is more intellectual and emotional in character. In the West, Scholastic theology evolved, which is antithetical to the Orthodox tradition. Western theology is based on rational thought whereas Orthodoxy is hesychastic. Scholastic theology tried to understand logically the Revelation of God and conform to philosophical methodology. Characteristic of such an approach is the saying of Anselm of Canterbury: "I believe so as to understand". The Scholastics acknowledged God at the outset and then endeavoured to prove His existence by logical arguments and rational categories. In the Orthodox Church, as expressed by the Holy Fathers, faith is God revealing Himself to man. We accept faith by hearing it not so that we can understand it rationally, but so that we can cleanse our hearts, attain to faith by "theoria" and experience the Revelation of God.
Scholastic theology reached its culminating point in the person of Thomas Aquinas, a saint in the Roman-Catholic Church. He claimed that Christian truths are divided into natural and supernatural. Natural truths can be proven philosophically, like the truth of the Existence of God. Supernatural truths -such as the Triune God, the incarnation of the Logos, the resurrection of the bodies- cannot be proven philosophically, yet then cannot be disproven. Scholasticism linked theology very closely with philosophy, even more so with metaphysics. As a result, faith was altered and scholastic theology itself fell into complete disrepute when the "idol" of the West-metaphysics-collapsed. Scholasticism is held accountable for much of the tragic situation created in the West with respect to faith and faith issues.
The Holy Fathers teach that natural and metaphysical categories do not exist but speak rather of the created and uncreated. Never did the Holy Fathers accept Aristotle's metaphysics. However, it is not my intent to expound further on this. Theologians of the West during the Middle Ages considered scholastic theology to be a further development of the theology of the Holy Fathers, and from this point on, begins the teaching of the Francs that scholastic theology is superior to that of the Holy Fathers. Consequently, Scholastics, who are occupied with reason, consider themselves superior to the Holy Fathers of the Church. They also believe that human knowledge, an offspring of reason, is loftier than Revelation and experience.