"'If that [St. John of the Cross' Ascent to Mount Carmel] is the real Catholic mysticism, it is precisely the religion for which Calvin fought all his life.'"
Auguste Lecerf (1872-1943) to his (former?) student Louis Bouyer, after "a conversation with [the latter] on the topic of Catholic mysticism," as reported at 63n26 of The memoirs of Louis Bouyer, trans. John Pepino (Kettering, OH: Angelico Press, 2015), where The spirit and forms of Protestantism, p. 65, as well as Le métier de théologien, pp. 15-17, is cited.