Metanoia — a deep and profound change of heart — comes from the Greek “metanoein,” meaning “change one’s mind.” The word has a strong connection to Christian theology, but across the different versions of texts, and depending on which theologian is translating, “metanoia” takes on different connotations. For Martin Luther, metanoia, or repentance, was the basis of the first of his 95 theses. For many of the Orthodox Christian religions, metanoias are physical prostrations as acts of prayer.