William Law discusses the nature of God as an infinite source of love, emphasizing that God's essence is unchanging and cannot include wrath or anger. He argues that all creatures exist to manifest God's love and goodness, and that any notion of divine wrath arises only from the fallen state of creation, not from God's nature. Law asserts that true goodness and happiness can only be found in the union of the divine life with human existence, and that the concept of wrath attributed to God in scripture must be understood in the context of human disobedience and separation from divine love.