But these two contradictions result from the classical idea of
and 
and we still have no right to make a disparaging judgment unless we have calculated this self-interaction energy. Therefore, we consider
and
as slightly deformed copies of an image of nature that we can just perceive as blurred. This is because the means
(,),
tthat we use for observation simply do not allow us to see more sharply. Only the combination of
and
t? the self-interaction energy - will enable us to see more sharply since it exists within the range of self-interaction.
We expressly reiterate this idea because it is absolutely fascinating. Within the range of self-interaction, there exists only the product of
and
ei.e. an energy; hence it is useless to discuss all other kinds of energy such as pure electrical or pure magnetic energy since the two do not exist. That's why quantum theory may provide statements about energies, energy levels, energy quanta, energy jumps etc. We mention this again because we understand this statement - that can finally be traced back to our magnetic field theorem formulated in the beginning - as an important indication for our concept.
To calculate the self-interaction energy we use the equation that leads to the derivation of the Poynting vector for light quanta. We expect that this equation can readily be applied to the problem to be solved because, according to our concept, light quanta are products of self-interaction.
XLI
The differential of the energy flowing through the area F (that is perpendicular to the propagation direction of the light wave) is equal to the length, divided by 4π, of the parallelepiped that is perpendicular to the area F, multiplied by the absolute values of
and
that lie in the plane of the area F. Here the length of the parallelepiped is given by the path of the light beam with the speed c that has been traveled within the period of time dt.
Of course, we have to rewrite this equation - that (like the equations of superconduction) is of summary nature - for our electron, namely for one particle. To that end, arbitrary acts are necessary againand, hopefully, success will justify the unallowable means.