20 John M. Vianney was an outstanding model of voluntary mortification of the body as well as of detachment from external things. "There is only one way"—he used to say—"for anyone to devote himself to God as he should through self-denial and the practice of penance: that is by devoting himself to it completely." (31) Throughout his whole life, the holy Cure of Ars carried this principle into practice energetically in the matter of chastity.
Source: Sacerdotii Nostri Primordia (Vatican.va)