John encapsulates the essence of his message in a profound declaration: “God is light.” This emphasises God’s purity, holiness, and truth. In contrast to the darkness of sin and falsehood, God’s light serves as a standard of righteousness and illumination. By affirming the absolute absence of darkness in God, John underscores the inherent goodness and moral perfection of the divine nature. This foundational truth sets the stage for John’s subsequent exhortations regarding the believer’s walk in the light and pursuit of righteousness.