Divino Afflante Spiritu §2

² Since then it is fitting that We should commemorate the fiftieth anniversary of the publication of this Encyclical Letter, which is considered the supreme guide in biblical studies, We, moved by that solicitude for sacred studies, which We manifested from the very beginning of Our Pontificate, have considered that this may most opportunely be done by ratifying and inculcating all that was wisely laid down by Our Predecessor and ordained by His Successors for the consolidating and perfecting of the work, and by pointing out what seems necessary in the present day, in order to incite ever more earnestly all those sons of the Church who devote themselves to these studies, to so necessary and so praiseworthy an enterprise.