  The bispinor wave function finds its fundamental application in the study of
electrons, neutrinos and protons as particles bound by their own potentials.
Classical electromagnetism and the Dirac electron theory appear to be natural
extensions of the physics that rules the electron itself. However, the charge
density and the negative energy eigenvalues are two concepts which cannot
survive further scrutiny. The electron and the proton resemble minute planetary
systems where the bispinor terms defining their physical properties revolve
with definite angular momentum around the singular point of the particles'
potentials. The mass of the electron--neutrino in relation to the electron's
and the mass of the latter in relation to the proton's are determined under
particular assumptions. The most important feature of the new approach is the
faithful representation of free particles at rest with respect to inertial
systems of reference. This certainly enhances the foundation of physics;
precisely in the realm of Quantum Mechanics, where the customary description of
free electrons is a confusing consequence of the limited scope of the
Schr\"{o}dinger and Dirac equations.
