Wolfgang Ernst Pauli (25 April 1900 – 15 December 1958) was an Austrian theoretical physicist and one of the pioneers of quantum physics. In 1945, after being nominated by Albert Einstein, he received the Nobel Prize in Physics for his "decisive contribution through his discovery of a new law of Nature, the exclusion principle or Pauli principle," involving spin theory, underpinning the structure of matter and the whole of chemistry.
Pauli was raised as a Roman Catholic, although eventually he and his parents left the Church. He was said to be a agnostic/deist and a mystic.
1.) Charles Paul Enz (2002). No Time to Be Brief: A Scientific Biography of Wolfgang Pauli. Oxford University Press. ISBN 9780198564799. "At the same time Pauli writes on 11 October 1957 to the science historian Shmuel Sambursky whom he had met on his trip to Israel (see Ref. , p. 964): 'In opposition to the monotheist religions — but in unison with the mysticism of all peoples, including the Jewish mysticism - I believe that the ultimate reality is not personal.'"
2.) Listed as an agnostic on NNDB.com. Wolfgang Pauli, NNDB.com.