Interview with Paul Adrien Maurice Dirac (1902–1984), Nobel Prize in Physics 1933, "for the discovery of new productive forms of atomic theory". Topics discussed: Symmetry as central concept in theoretical physics. Space and time according to Lorentz. Matter and anti-matter. Dirac's definition of symmetry. Fermions, Negative energy levels. Einstein's general theory of relativity. Natural times and lengths. Cosmology and gravitation. Relativistic quantum mechanics. Atomic constants.