Already in my original paper I stressed the circumstance that I was unable to give a logical reason for the exclusion principle or to deduce it from more general assumptions. I had always the feeling, and I still have it today, that this is a deficiency.

"Exclusion Principle and Quantum Mechanics," Nobel Prize acceptance lecture for the discovery of the Exclusion Principle, also called the Pauli Principle (Dec. 13, 1946)