A Mediaeval Mystic

[...]liberty of the spirit; the passion of lust she had the impudence to call seraphic love. She issued numerous pamphlets remarkable for their subtlety; and by one means and another she managed to win and retain a very considerable number of disciples. Moved by zeal and compassion on witnessing the ruin and loss of souls thus effected, John Ruysbroeck set himself to confute this heretic's various publications point by point as they appeared. In consequence, he incurred not a little hostility and persecution. Possibly it was this opposition which finally decided Ruysbroeck and his holy[...].