There were bold speculators in Italy enough, who had practically abandoned the Catholic faith. But the majority of these did not think it worth their while to make an open rupture with the Church. Theological hair-splitting reminded them only of the mediaeval scholasticism from which they had been emancipated by classical culture. They were less interested in questions touching the salvation of the individual or the exact nature of the sacraments, than in metaphysical problems suggested by the study of antique philosophers, or new theories of the material universe. [Footnote 10: See Berti's _Vita di G. Bruno_, pp. 105-108.] The indifference of these men in religion rendered it easy for them to conform in all external points to custom. Their fundamental axiom was that a scientific thinker could hold one set of opinions as a philosopher, and another set as a Christian. Their motto was the celebrated _Foris ut moris, intus ut libet_.[11] Nor were ecclesiastical authorities dissatisfied with this attitude during the ascendancy of humanistic culture. It was, indeed, the attitude of Popes like Leo, Cardinals like Bembo. And it only revealed its essential weakness when the tide of general opinion, under the blast of Teutonic revolutionary ideas, turned violently in favor of formal orthodoxy. Then indeed it became dangerous to adopt the position of a Pomponazzo. [Footnote 11: This maxim is ascribed to the materialistic philosopher Cremonini.] The mental attitude of such men is so well illustrated by a letter written by Celio Calcagnini to Peregrino Morato, that I shall not hesitate to transcribe it here. It seems that Morato had sent his correspondent some treatise on the theological questions then in dispute; and Calcagnini replies: