24 And to the doctrine of chastity let the first to give heed be the order of Solitaries and of Virgins, who maintain the angelic life in the world; and let the rest of the Church's people follow them. For you, brethren, a great crown is laid up: barter not away a great dignity for a petty pleasure: listen to the Apostle speaking: Lest there be any fornicator or profane person, as Esau, who for one mess of meat sold his own birthright. Enrolled henceforth in the Angelic books for your profession of chastity, see that thou be not blotted out again for your practice of fornication.
Source: Catechetical Lectures (New Advent)