THE central figure of Rosicrucian literature, towering as an intellectual giant above the crowd of souffleurs, theosophists, and charlatanic professors of the magnum opus, who, directly or otherwise, were connected with the mysterious Brotherhood, is Robertus de Fluctibus, the great English mystical philosopher of the seventeenth century, a man of immense erudition, of exalted mind, and, to judge by his writings, of extreme personal sanctity. Ennemoser describes him as one of the most distinguished disciples of Paracelsus, but refuses to number him with "those consecrated theosophists who draw all wisdom from the fountain of eternal light." He does not state his reasons for this depreciatory judgment, and the brief and inadequate notice which he gives of Fludd's system displays such a cursory acquaintance with the works in which it is developed, that it is doubtful whether he had taken pains to understand his author. I should rank the Kentish mystic second to none among the disciples of the "divine" Theophrastus, while in the profundity and extent of his learning, there can be no question that he far surpassed his master, who is said to have known little but to have divined almost everything, and who is, therefore, called divinus, in the narrower sense of that now much abused term.
Arthur Edward Waite