Those who knew him, studied under him, or built upon his work — speaking across time about a man who changed how humanity understands its own beginning.
This is the most beautiful and satisfactory explanation of creation to which I have ever listened.
After attending Lemaître's lectures in California and hearing the full exposition of the expanding universe and the primeval atom hypothesis.
"Lemaître was the greatest cosmologist of the twentieth century. He had the courage to follow the mathematics wherever it led — even when it led to a beginning."
Hoyle, who famously coined the term 'Big Bang' as a dismissal, later acknowledged the depth and originality of Lemaître's contribution.
"He was the most brilliant student I ever had. His mind moved between theology and physics with a naturalness that astonished everyone around him."
Eddington supervised Lemaître at Cambridge in 1923–1924 and remained a lifelong correspondent, though he initially resisted the idea of a cosmic beginning.
"There is no conflict between religion and science. The deeper we look into the cosmos, the more we find that the questions of science and the questions of faith are asking the same thing from different directions."
From a lecture at the Catholic University of Leuven, reflecting on his decades of navigating both vocations.
"Lemaître showed us that the universe has a history — that it was not always as it is now. That single insight is the foundation of all modern cosmology."
From reflections on the history of cosmology, acknowledging Lemaître's primacy in establishing the expanding, evolving universe.
"He wore his cassock to the blackboard and his equations to the altar. He never saw a contradiction — and in that, he was wiser than most of us."
A remembrance shared at the memorial gathering at the Catholic University of Leuven following Lemaître's death in June 1966.
"The hypothesis of the primeval atom is the most daring and most beautiful idea in the history of cosmology. It took a priest to see that the universe had a birthday."
From notes on the history of cosmological thought, acknowledging Lemaître's singular contribution to the idea of cosmic origins.
"I have too much respect for the idea of God to make it responsible for such an absurd world. But Lemaître — he found a way to hold both the absurdity and the glory at once."
The celebrated Belgian author, a compatriot of Lemaître, reflecting on the priest-physicist's unique synthesis of faith and reason.
Monsignor Lemaître died on June 20, 1966 — just weeks after learning that the cosmic microwave background radiation had been detected, confirming his theory of a hot, dense beginning to the universe. He died knowing he was right. He is buried in Leuven, Belgium, where he taught for nearly four decades. His name is carried by asteroid 1565 Lemaître, and his idea — that the universe had a beginning — is now the foundation of all modern cosmology.
1894 — 1966