47 Let all the other sons of the Church bear in mind that the efforts of these resolute laborers in the vineyard of the Lord should be judged not only with equity and justice, but also with the greatest charity; all moreover should abhor that intemperate zeal which imagines that whatever is new should for that very reason be opposed or suspected. Let them bear in mind above all that in the rules and laws promulgated by the Church there is question of doctrine regarding faith and morals; and that in the immense matter contained in the Sacred Books - legislative, historical, sapiential and prophetical - there are but few texts whose sense has been defined by the authority of the Church, nor are those more numerous about which the teaching of the Holy Fathers is unanimous. There remain therefore many things, and of the greatest importance, in the discussion and exposition of which the skill and genius of Catholic commentators may and ought to be freely exercised, so that each may contribute his part to the advantage of all, to the continued progress of the sacred doctrine and to the defense and honor of the Church.
Source: Divino Afflante Spiritu (Vatican.va)