Abstract What did Lossky expect his readers to understand by ‘mystical theology’? For when his Mystical Theology was published (in 1944), ‘mysticism’, or la mystique was very much in the air. Von Hügel had begun a trend, picked up by Heiler and Otto, and in Catholic circles by Bremond, Poulain, and Saudreau; Baruzi’s influential book on St John of the Cross discussed the problem of ‘mystical...