0 To Our Venerable Brothers, the Patriarchs, Archbishops and Bishops and other Ordinaries in Peace and Communion with the Holy See. Venerable Brothers, Health and Apostolic Benediction. The Orient, courageously and successfully explored by the Portuguese, is coveted by many today for its lucrative trade. We, however, have a more noble purpose in mind. We reflect upon those immense regions of the Indies where for many centuries men of the Gospel have expended their labor. Our thoughts turn first of all to the blessed Apostle Thomas who is rightly called the founder of preaching the Gospel to the Hindus. Then, there is Francis Xavier, who long afterwards dedicated himself zealously to the same praiseworthy calling. Through his extraordinary perseverance, he converted hundreds of thousands of Hindus from the myths and vile superstitions of the Brahmans to the true religion. In the footsteps of this holy man followed numerous priests, secular and religious, who with the authority and permission of the Holy See strove untiringly to preserve and promote the Christian mysteries and institutions introduced by Thomas and renewed by Xavier. To this day, they are continuing these noble efforts; nevertheless, in the vast reaches of the earth, many are still deprived of the truth, miserably imprisoned in the darkness of superstition! How very great a field, especially in the north, lies yet uncultivated to receive the seed of the Gospel!
Source: Ad Extremas (Vatican.va)