To Margaret:
How beautiful, then, the marriage of two Christians, two who are one in hope, one in desire, one in the way of life they follow, one in the religion they practice. They are as brother and sister, both servants of the same Master. Nothing divides them, either in flesh or in spirit. They are, in very truth, two in one flesh; and where there is but one flesh there is also but one spirit. They pray together, they worship together, they fast together; instructing one another, encouraging one another, strengthening one another.
—Tertullian (to his wife)