4 This, indeed, may seem of small likelihood to such as confine their whole thought and care to the evidence of the senses, and refuse to look for anything higher. But great intellects, on the contrary, are usually wont to cherish higher ideals; for they, of all men, are most excellently fitted to receive the intuitions and breathings of Divine faith. Columbus certainly had joined to the study of nature the study of religion, and had trained his mind on the teachings that well up from the most intimate depths of the Catholic faith. For this reason, when he learned from the lessons of astronomy and the record of the ancients, that there were great tracts of land lying towards the West, beyond the limits of the known world, lands hitherto explored by no man, he saw in spirit a mighty multitude, cloaked in miserable darkness, given over to evil rites, and the superstitious worship of vain gods. Miserable it is to live in a barbarous state and with savage manners: but more miserable to lack the knowledge of that which is highest, and to dwell in ignorance of the one true God. Considering these things, therefore, in his mind, he sought first of all to extend the Christian name and the benefits of Christian charity to the West, as is abundantly proved by the history of the whole undertaking. For when he first petitioned Ferdinand and Isabella, the Sovereigns of Spain, for fear lest they should be reluctant to encourage the undertaking, he clearly explained its object: "That their glory would grow to immortality, if they resolved to carry the name and doctrine of Jesus Christ into regions so distant." And in no long time having obtained his desires, he bears witness: "That he implores of God that, through His Divine aid and grace, the Sovereigns may continue steadfast in their desire to fill these new missionary shores with the truths of the Gospel." He hastens to seek missionaries from Pope Alexander VI, through a letter in which this sentence occurs: "I trust that, by God's help, I may spread the Holy Name and Gospel of Jesus Christ as widely as may be." He was carried away, as we think, with joy, when on his first return from the Indies he wrote to Raphael Sanchez: "That to God should be rendered immortal thanks, Who had brought his labours such prosperous issues; that Jesus Christ rejoices and triumphs on earth no less than in Heaven, at the approaching salvation of nations innumerable, who were before hastening to destruction." And if he moved Ferdinand and Isabella to decree that only Catholic Christians should be suffered to approach the New World and trade with the natives, he brought forward as reason, "that he sought nothing from his enterprise and endeavour but the increase and glory of the Christian religion." And this was well known to Isabella, who better than any had understood the great man's mind; indeed it is evident that it had been clearly laid before that most pious, masculine-minded, and great-souled woman. For she had declared of Columbus that he would boldly thrust himself upon the vast ocean, "to achieve a most signal thing, for the sake of the Divine glory." And to Columbus himself, on his second return, she writes: "That the expenses she had incurred, and was about to incur, for the Indian expeditions, had been well bestowed; for thence would ensure a spreading of Catholicism,"
Source: Quarto Abeunte Saeculo (Vatican.va)