Renormalization as a "knowledge".
'' So we really do not know exactly what it is that we are
assuming that gives us the difficulty producing infinities.
A nice problem !
However, it turns out that it is possible to sweep the infinities
under the rug , by a certain crude skill , and temporarily we are
able to keep on calculating. ''
/ The Character of Physical Law. Lecture 7. Seeking new laws, page 156.
By Richard Feynman /
Renormalisation techniques saved result from ''infinities''
but swept the truth under the rug. / “Shut up and calculate” /