42 With heart deeply grateful to the Father of Light, from Whom descends "every best gift and every perfect gift," We see on all sides consoling signs of this spiritual renewal. We see it not only in so many singularly chosen souls who in these last years have been elevated to the sublime heights of sanctity, and in so many others who with generous hearts are making their way towards the same luminous goal, but also in the new flowering of a deep and practical piety in all classes of society even the most cultured, as We pointed out in Our recent Motu Proprio In multis solaciis of October 28 last, on the occasion of the reorganization of the Pontifical Academy of Sciences.
Source: Divini Redemptoris (Vatican.va)