No matter how much our knowledge may expand we can never eliminate this box. No matter how vast our finite knowledge, it can never circumscribe that which is infinite. Young's insight into the nature and significance of the quantum of uncertainty is an essential component of his theory and one of his most profound gifts to science. While the energy of a photon varies in direct proportion to its frequency, Planck determined that photons in nature must always package their energy in units of action of constant invariant size. Since all chemical and molecular activity is dependent on the transmission of quanta of action from one point to another, i.e., all activity comes from photons, the quantum of action can be viewed as the fundamental unit of the universe.
Photons have no rest mass and no time.
We observe them moving at the speed of light, which is more significant as a boundary condition of the physical universe than as a measure of the photon. They are as nonmaterial and ephemeral as anything in the manifest universe. The quantum of action also happens to be exactly the same size as the minimum uncertainty of Heisenberg's uncertainty principle, suggesting that it is equivalent to a quantum of uncertainty. Action is totally unpredictable. Science can never penetrate its mysteries.