Anselm of Canterbury, in his "Proslogion," presented the ontological argument for the existence of God, which posits that the very concept of a maximally great being (God) entails its existence.

For Thomas Aquinas, God's simplicity is his fundamental attribute, meaning that he is without composition or division, both in his essence and in his attributes.

John Duns Scotus, in his defense of the doctrine of divine simplicity, stressed God's absolute unity and oneness, arguing that God's essence is indivisible and cannot be composed of parts.

Medieval philosophers generally held that the highest good for humans is to achieve moral excellence and ultimately have a mystical union with God, which is often referred to as the beatific vision.

William of Ockham, in his discussion of divine omnipotence, maintained that God cannot act against logical and moral principles, such as creating a square circle or commanding someone to sin.

Medieval philosophers generally believed that God interacts with the world primarily through natural laws and processes, rather than through direct interventions or miracles.

Thomas Aquinas, in his discussion of divine attributes, stressed God's perfect goodness and benevolence, arguing that God is the source of all goodness and that he wills only what is good.

Medieval philosophers generally held that the ultimate goal of human existence is to know and love God and to live in accordance with his will, which often involves pursuing moral excellence and seeking union with the divine.

Thomas Aquinas, in his "Summa Theologica," presented five proofs for the existence of God, including the argument from motion, the argument from efficient causation, and the argument from design.

Medieval philosophers generally held that God's knowledge of future events is exhaustive, but it does not necessitate human actions, allowing for human freedom and moral responsibility.

John Duns Scotus, in his discussion of divine attributes, stressed God's transcendence and his radical otherness from the created world, arguing that God's essence is incomprehensible and unknowable by human reason.

Medieval philosophers generally believed that humans can come to know God through a combination of rational inquiry, mystical experiences, and moral living, each contributing to a deeper understanding of the divine.

Thomas Aquinas, in his "Summa Theologica," presented the argument from the first cause or unmoved mover as one of his five proofs for the existence of God.

Medieval philosophers generally held that God is both transcendent and immanent, interacting with the world through natural laws and occasional interventions, while maintaining his distinctness from the created realm.

Anselm of Canterbury, in his "Proslogion," presented the ontological argument for the existence of God, which posits that the very concept of a perfect being (God) entails its existence.