There was a moment in Feynman’s life as a physicist that he almost discovered the source of the quantum vacuum fluctuations of zero-point energies. This was his realization that the word ‘dipole’ is a bit misleading when applied to a magnetic field since there are no magnetic “poles” that correspond to electric charges. The parlance of modern physicists would call them magnetic monopoles. Nonetheless, Feynman believed that the magnetic “dipole field” is produced by an elementary current loop. But he did not extend this idea any further. Now, the fundamental question is what is the true nature of this elementary current loop? Feynman forgot to give any plausible explanation. Did he really forget? Maybe he really did not know. On the other hand, he positively understood the physical symmetry that existed between electric dipole and magnetic dipole since both could be derived from the same mathematical principles. He knew that the electric dipole produces the electric field and the magnetic dipole produces the magnetic field. He also knew that the electric dipole is composed of equal numbers of oppositely charged particles. But the magnetic dipole is simply a loop and this loop alone is capable of producing a magnetic field. If there is equal number of something for the first case then there must also be equal number of something else in the second case.

This something else is the space-time charges of H-pluses and H-minuses. Each H-plus is a Hopf link composed of two Möbius loops. Likewise, for the H-minuses with the exception that one out of every pair of Möbius loops is rotating in the “counterclockwise” direction while the others are rotating in the “clockwise” direction. The search for the mathematical descriptions these Hopf links and Möbius loops prompted Julian Schwinger to create a source theory. It will be the next topic of discussion.