Metanoia: a change in one’s way of life through the transformation of the heart resulting from penitence or spiritual conversion. Metanoia: a change in one’s way of life through the transformation of the heart resulting from penitence or spiritual conversion. Metanoia: a change in one’s way of life through the transformation of the heart resulting from penitence or spiritual conversion. Metanoia: a change in one’s way of life through the transformation of the heart resulting from penitence or spiritual conversion.