Jan van Ruysbroeck Jan van Ruysbroeck (1293–1381) was an influential Flemish mystic known as the "Admirable Doctor." He was a central figure in the movement of Dutch and German mysticism.

The Adornment of the Spiritual

Marriage Original title: "Die Zierde der geistlichen Hochzeit." This is Ruysbroeck's most celebrated work, outlining the three stages of the spiritual life: the active, the yearning, and the contemplative.