Pope Francis to Scientists on Lemaitre, Einstein and Aquinas


Dear friends,

I extend a heartfelt welcome to you all, and I thank Brother Guy Consolmagno for his kind words.

The issues you have been addressing during these days at Castel Gandolfo are of particular interest to the Church, because they have to do with questions that concern us deeply, such as the beginning of the universe and its evolution, and the profound structure of space and time, to name but a few.  It is clear that these questions have a particular relevance for science, philosophy, theology and for the spiritual life.  They represent an arena in which these different disciplines meet and sometimes clash.

As both a Catholic priest and a cosmologist, Msgr. Georges Lemaître knew well the creative tension between faith and science, and always defended the clear methodological distinction between the fields of science and theology.  While integrating them in his own life, he viewed them as distinct areas of competence. That distinction, already present in Saint Thomas Aquinas, avoids a short-circuiting that is as harmful to science as it is to faith.

Before the immensity of space-time, we humans can experience awe and a sense of our own insignificance, as the Psalmist reminds us:  “What is man that you should keep him in mind, the son of man that you care for him?” (Ps 8:5). As Albert Einstein loved to say: “One may say the eternal mystery of the world is its comprehensibility.” The existence and intelligibility of the universe are not a result of chaos or mere chance, but of God’s Wisdom, present “at the beginning of his work, the first of his acts of old” (Prov. 8:22).

I am deeply appreciative of your work, and I encourage you to persevere in your search for truth. For we ought never to fear truth, nor become trapped in our own preconceived ideas, but welcome new scientific discoveries with an attitude of humility. As we journey towards the frontiers of human knowledge, it is indeed possible to have an authentic experience of the Lord, one which is capable of filling our hearts.

Greeting Address to the participants of the Conference organized by the Vatican Observatory,  Friday, 12 May 2017

Source: Vatican homepage 



Georges Lemaitre on Physics and Providence


Georges LeMaitre on Physics Chance Providence


« Physics does not exclude Providence. Nothing happens without its order or permission, even if this gentle action is not miraculous. Evolution, whether of the universe or of the living world, could be made at random by quantum leaps or mutations. Nevertheless, this chance has, from a superior point of view, been directed towards a goal. For us Christians, it was oriented towards the appearance of life. In what was done, there was life, intelligence and life was light in man and finally in humanity by the incarnation of the Man-God: the true light that illuminated our darkness.

Chance does not exclude Providence. Perhaps chance provides the strokes mysteriously actuated by Providence. »

Georges Lemaitre, 1966


« La physique n’exclut pas la providence. Rien n’arrive sans son ordre ou sa permission, même si cette action suave n’a rien de miraculeux. L’évolution, que ce soit celle de l’univers ou du monde vivant, a pu se faire au hasard des sauts quantiques ou des mutations. Néanmoins, ce hasard a pu d’un point de vue supérieur être orienté vers un but. Pour nous chrétien, il a été orienté vers l’apparition de la vie. En ce qui a été fait, il y avait de la vie, de l’intelligence et la vie était lumière chez l’homme et enfin dans l’humanité par l’incarnation de l’Homme-Dieu : la vraie lumière qui a illuminé nos ténèbres.

Le hasard n’exclut pas la Providence. Peut-être le hasard fournit-il les touches qu’actionne mystérieusement la Providence. »


Lemaître, « L’expansion de l’Univers: Réponses à des questions posées par Radio Canada le 15 avril 1966 », Revue des Questions Scientifiques, t. CXXXVIII (5e série, t. XXVIII), avril 1967, n°2, pp. 153-162, version revue et adaptée par O. Godart. In: Dominique Lambert, Georges Lemaître : repères biographiques. Revue des Questions Scientifiques, 2012, 183 (4) : 1-59



Georges Lemaitre on the Christian scientist



He (the Christian researcher) knows that not one thing in all creation has been done without God, but he knows also that God nowhere takes the place of his creatures.
Omnipresent divine activity is everywhere essentially hidden.
It never had to be a question of reducing the supreme Being to the rank of a scientific hypothesis.

George Lemaître, Astrophysicist and Catholic priest