According to St. Thomas Aquinas, religion, sanctity, and devotion are interconnected concepts. Religion is a moral virtue that involves offering God due honor through acts like sacrifice and adoration. Sanctity refers to the state of a person's mind and actions being directed towards God, encompassing both the external acts of religion and the internal disposition of the soul. Devotion, as a special act of the will, is the prompt desire to serve God and carry out acts of divine worship. Aquinas views religion as the foundation for sanctity, as it involves both external acts and internal disposition. Devotion, being an act of the will, is the principal act of religion and a cause of sanctity. Thus, religion, sanctity, and devotion are interrelated, with religion being the virtue, sanctity being the state of living according to that virtue, and devotion being the driving force behind both.