Sacerdotalis Caelibatus §53

⁵³ Considering what contemporary scholarly investigation has ascertained, it is not right to continue repeating (l01) that celibacy is against nature because it runs counter to lawful physical, psychic and affective needs, or to claim that a completely mature human personality demands fulfillment of these needs. Man, created to God's image and likeness, (102) is not just flesh and blood; the sexual instinct is not all that he has; man has also, and pre-eminently, understanding, choice, freedom, and thanks to these powers he is, and must remain, the chief work of creation; they give him mastery over his physical, mental and emotional appetites.