Ps. xxiii. 5. Many of the Fathers interpret this text of the Lord’s Supper, as Augustin does above. The fish taken out of the deep, which is fed upon, means Christ, in accordance with the well-known acrostic of ΙΧΘΥΣ. “If,” he says in his De Civ. Dei, xviii. 23, “you join the initial letters of these five Greek words, Ἰησοῦς Χριστὸς Θεοῦ Υἱὸς Σωτὴρ, which mean, ‘Jesus Christ the Son of God, the Saviour,’ they will make the word ἰχθύς,—that is, ‘fish,’ in which word Christ is mystically understood, because He was able to live, that is, to exist without sin in the abyss of this mortality as in the depth of waters.” So likewise we find Tertullian saying in his De Bapt. chap. I.: “Nos pisciculi, secundum ΙΧΘΥΝ nostrum Jesum Christum in aqua nascimur; nec aliter quam in aqua permanendo salvi sumus.” See Bishop Kaye’s Tertullian, pp. 43, 44; and sec. 34, below.