Chapter 21 — Part II: The Sacraments — Holy Orders
Section 34. Still there are some who consider that by the circle, which is the most perfect of all figures, is signified the profession of a more perfect life undertaken by ecclesiastics; while in view of the fact that the hair of their heads, which is a kind of bodily superfluity, is cut off, others think that it denotes contempt for external things, and detachment of soul from all human cares.