Lives of the Saints, by Alban Butler, Benziger Bros. ed. [1894], at sacred-texts.com
PETER, while still a youth, left his home at Alcantara in Spain, and entered a convent of Discalced Franciscans. He rose quickly to high posts in the Order, but his thirst for penance was still unappeased, and in 1539, being then forty years old, he founded the first convent of the "Strict Observance." The cells of the friars resembled graves rather than dwelling-places. That of St. Peter himself was four feet and a half in length, so that he could never lie down; he ate but once in three days; his sack-cloth habit and a cloak were his only garments, and he never covered his head or feet. In the bitter winter he would open the door and window of his cell that, by closing them again, he might experience some sensation of warmth. Amongst those whom he trained to perfection was St. Teresa. He read her soul, approved of her spirit of prayer, and strengthened her to carry out her reforms. St. Peter died, with great joy, kneeling in prayer, October 18, 1562, at the age of sixty-three.
Reflection.—If men do not go about barefoot now, nor undergo sharp penances, as St. Peter did, there are many ways of trampling on the world; and Our Lord teaches them when He finds the necessary courage.