nature, but by assuming a human nature." For Thomas, "the divine nature is sufficiently full, because every perfection of goodness is there. But human nature and the soul are not full, but capable of fulness, because it was made as a slate not written upon. Therefore, human nature is empty." Thus, when Paul indicates that Christ "emptied himself" this is to be understood in light of his assumption of a human nature. In short "Christ had a real body of the same nature of ours, a true rational soul, and, together with these, perfect Deity". Thus, there is both unity (in his one hypostasis) and composition (in his two natures, human and Divine) in Christ. Echoing Athanasius of Alexandria, he said that "The only begotten Son of God... assumed our nature, so that he, made man, might make men gods." Goal of human life Thomas Aquinas identified the goal of human existence as union and eternal fellowship with God. This goal is achieved through the beatific vision, in which a person experiences perfect, unending happiness by seeing the essence of God. The vision occurs after death as a gift from God to those who in life experienced salvation and redemption through Christ. The goal of union with God has implications for the individual's life on earth. Thomas stated that an individual's will must be ordered toward right things, such as charity, peace, and holiness. He saw this orientation as also the way to happiness. Indeed, Thomas ordered his treatment of the moral life around the idea of happiness. The relationship between will and goal is antecedent in nature "because rectitude of the will consists in being duly ordered to the last end [that is, the beatific vision]." Those who truly seek to understand and see God will necessarily love what God loves. Such love requires morality and bears fruit in everyday human choices. Treatment of heretics Thomas Aquinas belonged to the Dominican Order (formally Ordo Praedicatorum, the Order of Preachers) who began as an order dedicated to the conversion of the Albigensians and other heterodox factions, at first by peaceful means; later the Albigensians were dealt with by means of the Albigensian Crusade. In the Summa Theologiae, he wrote: With regard to heretics two points must be observed: one, on their own side; the other, on the side of the Church. On their own side there is the sin, whereby