When he had completed his _Great Didactic_, he did not publish it, for he was still hoping to be restored to his native Moravia, where he proposed to execute all his philanthropic schemes; indeed, the treatise was first written in his native Slav or Czech tongue. In 1632 there was convened a synod of the Moravian Brethren at Lissa, at which Comenius, now forty years of age, was elected to succeed his father-in-law, Cyrillus, as bishop of the scattered brethren--a position which enabled him to be of great service, by means of correspondence, to the members of the community, who were dispersed in various parts of Europe. Throughout the whole of his long life he continued this fatherly charge, and seemed never quite to abandon the hope of being restored, along with his fellow-exiles, to his native land--a hope doomed to disappointment. In his capacity of pastor-bishop he wrote several treatises, such as a _History of the Persecutions of the Brotherhood_, an account of the Moravian Church discipline and order, and polemical tracts against a contemporary Socinian. Meanwhile his great didactic treatise, which had been written in his native Czech tongue, was yet unpublished. He was, it would appear, stimulated to the publication of it by an invitation he received in 1638, from the authorities in Sweden, to visit their country and undertake the reformation of their schools. He replied that he was unwilling to undertake a task at once so onerous and so invidious, but that he would gladly give the benefit of his advice to anyone of their own nation whom they might select for the duty. These communications led him to resume his labor on the _Great Didactic_, and to translate it into Latin, in which form it finally appeared. Humanism, which had practically failed in the school, had, apart from this fact, no attractions for Comenius, and still less had the worldly wisdom of Montaigne. He was a leading Protestant theologian--a pastor and bishop of a small but earnest and devoted sect--and it was as such that he wrote on education. The best results of humanism could, after all, be only culture, and this not necessarily accompanied by moral earnestness or personal piety: on the contrary, probably dissociated from these, and leaning rather to scepticism and intellectual self-indulgence.