In 1609, towards the end of his life, Benet published his masterpiece, "Règle de perfection réduite au seul point de la volonté divine" ("Rule of Perfection"). This work fell under the disapproval of the Church in the early 17th century, and is therefore less well-known than "Holy Wisdom" by his contemporary and associate Augustine Baker. Both authors deal with the subject of contemplative prayer, the deep form of prayer followed in monastic orders. Canfield was probably influenced by the Flemish mystic Jan Ruusbroec.