The Spiritual Espousals (Die gheestelike brulocht)
Ruusbroec's masterwork was composed in Middle Dutch c. 1340 while he was still a chaplain in Brussels, before his 1343 move to the Groenendaal hermitage in the Sonian Forest. Organized around Matthew 25:6 — 'See, the bridegroom comes, go out to meet him' — the Espousals traces three stages of the soul's ascent (active, interior, and contemplative) toward union with God. It survives in 36 Dutch manuscripts and Latin and Middle High German translations; Geert Groote visited Ruusbroec at Groenendaal c. 1378 and the text directly shaped the Devotio Moderna programme of interior reform. The Latin translation by the Carthusian Surius (1552) ensured broader circulation among learned elites across Catholic Europe.