In his first philosophical lecture on modern physics that Pauli gave in November 1934 to the Zurich Philosophical Society he said that only a formulation of quantum theory would be satisfactory which expresses the relation between the value of [the fine structure constant] and charge conservation in the same complementary was as that between the space-time description and energy-momentum conservation.
Charles P. Enz, No Time to Be Brief: A Scientific Biography of Wolfgang Pauli
charge-conservation, fine-structure-constant, history-of-science, physics, quantum-theory, wolfgang-pauli