96 To see this is to glimpse the solution of another problem: the problem of the enduring validity of the conceptual language used in Conciliar definitions. This is a question which my revered predecessor Pius XII addressed in his Encyclical Letter Humani Generis . This is a complex theme to ponder, since one must reckon seriously with the meaning which words assume in different times and cultures. Nonetheless, the history of thought shows that across the range of cultures and their development certain basic concepts retain their universal epistemological value and thus retain the truth of the propositions in which they are expressed. Were this not the case, philosophy and the sciences could not communicate with each other, nor could they find a place in cultures different from those in which they were conceived and developed. The hermeneutical problem exists, to be sure; but it is not insoluble. Moreover, the objective value of many concepts does not exclude that their meaning is often imperfect. This is where philosophical speculation can be very helpful. We may hope, then, that philosophy will be especially concerned to deepen the understanding of the relationship between conceptual language and truth, and to propose ways which will lead to a right understanding of that relationship.
Source: Fides et Ratio (Vatican.va)