Among many speeches following Pope Francis’s address to the Humanum colloquium on complementarity, that of Lord Jonathan Sacks, the former Chief Rabbi of the United Kingdom, was the standout, bringing the audience of 300 in the synod hall to their feet. Using dazzling oratory, he offered a magisterial account of the development of marriage from the very start — a sexual act between fish in Scotland — right up to the present day, told by means of seven stories, and ending with a spectacular exegesis of the Genesis account.