John van Ruysbroeck, original Flemish name Jan van Ruusbroec () (1293 or 1294 – 2 December 1381) was an Augustinian canon and one of the most important of the Flemish mystics. Some of his main literary works include The Kingdom of the Divine Lovers, The Twelve Beguines, The Spiritual Espousals, A Mirror of Eternal Blessedness, The Little Book of Enlightenment, and The Sparkling Stone. Some of his letters also survive, as well as several short sayings (recorded by some of his disciples, such as Jan van Leeuwen). He wrote in the Dutch vernacular, the language of the common people of the Low Countries, rather than in Latin, the language of the Catholic Church liturgy and official texts, in order to reach a wider audience. Life Until his ordination John had a devout mother, who brought him up in the Catholic faith; of his father we know nothing. John's surname, Van Ruusbroec, is not a surname in the modern sense but a toponym that refers to his native hamlet - modern-day Ruisbroek near Brussels. At the age of eleven he left his mother, departing without leave or warning, to place himself under the guidance and tuition of his uncle, Jan Hinckaert, a canon regular of St. Gudule's, Brussels. Hinckaert was living according to his Apostolic views with a fellow-canon, Frank van Coudenberg. This uncle provided for Ruysbroeck's education with a view to the priesthood. In due course, Ruysbroeck was presented with a prebend in St. Gudule's, and ordained in 1318. His mother had followed him to Brussels, entered a Béguinage there, and died shortly before his ordination. Priest in Brussels From 1318 until 1343 Ruysbroeck served as a parish priest at St. Gudula. He continued to lead, together with his uncle Hinckaert and Van Coudenberg, a life of extreme austerity and retirement. At that time the Brethren of the Free Spirit were causing controversy in the Netherlands and one of them, a woman named Heilwige Bloemardinne, was particularly active in Brussels, propagating her beliefs chiefly by means of popular pamphlets. Ruysbroeck responded with pamphlets also written in the native tongue (Middle Dutch). Nothing of these treatises remains. The controversy had a permanent effect on Ruysbroeck: his later writings bear constant reference, direct and indirect, to the heretical views expressed in these times, and he always wrote in the country's native language, chiefly with a view to counteract these writings which he