1911 Encyclopædia Britannica (1911)
“ This school at Deventer had become famous long before Thomas à Kempis was admitted to its classes. It had been founded by Gerhard Groot (q.v.) , a wealthy burgher who had been won to pious living mainly through the influence of Ruysbroeck, the Flemish mystic. It was at Deventer, in the midst of this mystical theology and hearty practical benevolence, that Thomas à Kempis was trained. Gerhard Groot was his saintly ideal. Florentius Radewyn and Gerhard’s other early disciples were his heroes; their presence was his atmosphere, the measure of their lives his horizon. ”
