Mater et Magistra §235

²³⁵ There is, alas, a spirit of hedonism abroad today which beguiles men into thinking that life is nothing more than the quest for pleasure and the satisfaction of human passions. This attitude is disastrous. Its evil effects on soul and body are undeniable. Even on the natural level temperance and simplicity of life are the dictates of sound policy. On the supernatural level, the Gospels and the whole ascetic tradition of the Church require a sense of mortification and penance which assures the rule of the spirit over the flesh, and offers an efficacious means of expiating the punishment due to sin, from which no one, except Jesus Christ and His Immaculate Mother, is exempt.