Genesis 9:12Meaning & Commentary from the Church Fathers

Moreover, focusing not on His own essence but on our frailty, God does not simply offer a verbal assurance. Indeed, displaying His grace towards us, He provides a sign that could extend indefinitely, alleviating humanity's fear of such disasters; so that even amidst heavy rain, unusual tempests, or tremendous floods, we need not be frightened, but rather find peace in this sign: This is the sign of the covenant which I make between Me and you. Observe the honor bestowed upon the righteous. Just as one man converses with another, so God establishes a covenant with humanity, declaring, This is the sign of the covenant which I make between Me and you, and between every living being that is with you, for generations to come. The sign promised to all living beings is meant to last indefinitely. God grants a sign not only to all creatures in general but also eternally, until the end of time. What is this sign?

What is the significance of the rainbow that God set in the cloud as a reminder of His covenant with humanity? The four colors of the rainbow reveal that the Lord’s physical body, like ours, consists of four elements and, like the rainbow, is without an origin. He placed it in the cloud, which symbolizes the world—a world that is like a cloud due to God's anger, manifesting in the punishment of death. Sometimes a cloud signifies blessing, providing gentle rain or shade from the heat, while at other times, it represents divine wrath, bringing forth heavy rains or hail. Thus, the Lord asserts that He positions the rainbow in the cloud, highlighting the Incarnation of the Lord amidst a world marked by wrath, ensuring that humanity will no longer be overwhelmed by the waters of iniquity. Through this, He establishes the rainbow as a reminder that the Lord’s reconciliation with us signifies a struggle against our foes, illustrating how the Lord’s conflict with the enemy transforms into our reconciliation.

Noah was anxious that another deluge might occur, wiping out all living creatures. In response, the Lord God, offering him solace, established a covenant promising never to allow another flood to ravage the earth. As a visible assurance of this covenant, He set a rainbow in the sky. In this way, the compassionate Creator restored harmony with His creation and blessed the earth with abundance, orchestrating the seasons and declaring: “Sowing and reaping, winter and heat, summer and autumn, day and night shall not cease” (Genesis 8:22).

This belief, which recognizes the union of the unseen reality with the tangible sign, stands as the most defining aspect of this covenant. Without it, the covenant would merely be a blessing or promise limited to the natural world. Instead, it possesses a sacramental and gracious nature. The Word and Sacrament are fundamental to the Church.

The ‘arc in the cloud,’ also known as the rainbow, is formed by the refraction of light rays through raindrops, breaking the light into seven distinct colors, similar to how it behaves when passing through a prism. Given this phenomenon's nature, it can be inferred that the rainbow was visible before the deluge. It is hard to believe that the rainbow was merely a natural occurrence related to rainfall before the flood, yet afterward, the Lord transformed it into a symbol of His grace towards humanity. During the flood, the skies were shrouded in clouds that entirely blocked the sunlight, preventing people from witnessing the rainbow for an entire year. After this event, such an extensive period of darkness will not occur again.