Hayagrīva: (indistinct) Again, like Augustine, Aquinas believed that sin and man go together due to Adam's, the first man's original sin. All men require salvation. Salvation can only be attained through God's grace. The individual living entity has to assent by his free will in order for God's grace to function.
Prabhupāda: Yes. That is bhakti. Bhakti is devotional service. So you, sevonmukhe hi jihvādau (Brs. 1.2.234), and bhakti is our eternal engagement. So salvation means when you are engaged in our eternal activities, that is called salvation, or liberation. When you are engaged in false activities, that is called māyā. Muktir hitvā anyathā rūpaṁ sva-rūpeṇa vyavasthitiḥ. Muktiḥ means to remain in one's own constitutional position. In the material world we are also engaged in different types of activities, but they are with reference to the particular body. In the spiritual world spirit, as he is, is engaged in the service of the Lord. That is liberation.
Hayagrīva: Concerning law and government, Aquinas believed in the Divine Law, which consisted of the commandments of God given in the Bible. Aquinas felt that human laws also have some moral bearing, and that they also emanate indirectly from God, for he felt that all earthly powers exist by God's permission. Ideally, the Church is God's emissary on earth, and Aquinas considered it proper that the Church control earthly secular power as well. That is, he felt the secular rulers should remain subservient to the Church, and he felt that the Church could excommunicate, that means throw out, a monarch or ruler, in which case the ruler could no longer claim his throne. In other words, that the church has not only spiritual power but secular power on earth. Should have.
Prabhupāda: Yes, because the world activities must be regulated to the ultimate goal, understanding of God. Human civilization is meant for understanding God. So although the Church or the brāhmaṇas may not directly handle administrative activities, but it must be done under their supervision, or under their instruction. That is Vedic system. The brāhmaṇa is the Church, and the kṣatriya, the administrator. So the administrator used to take instruction from the brāhmaṇas, or one who can deliver a spiritual message. This is also mentioned in the Bhagavad-gītā, that Kṛṣṇa, millions of years ago, He instructed the message of Bhagavad-gītā to the sun-god. Sun-god is the origin of administrators, kṣatriya. So therefore the king, or the kṣatriya who administrators the business of the state, if he follows the instruction of veda through the brāhmaṇa or the Church, then he is called rājarṣi-king, and at the same time saintly person. Although he is king, he is following the instruction of saintly person or the Church. So in this way if the brāhmaṇas or the Church are in order, their instruction is in order, and the administrators, kṣatriya, they follow that instruction, he is in order. So the brāhmaṇa, kṣatriya, vaiśya. Vaiśya, if he follows the instruction of the kṣatriya, he is in order, and śūdras, they have no intelligence; therefore they follow the instruction of the three superior orders. This is the division of the society.