Noahic Covenant

"As often as we look upon [the rainbow], we read this promise from God, that the earth will never be destroyed by a flood. Wherefore, if any philosophaster, to deride the simplicity of our faith, shall contend that the variety of colours arises naturally from the rays reflected by the opposite cloud, let us admit the fact; but, at the same time, deride his stupidity in not recognising God as the Lord and governor of nature, who, at his pleasure, makes all the elements subservient to his glory." - John Calvin