2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107943Very recently we present a theory to discuss the nature of light and show that the quantization of light energy in vacuum can be derived directly from classical electromagnetic theory. In the theory a key concept of stability of statistical distribution and a variational procedure searching for those of relatively stable statistical distributions were introduced. This is a classical interpretation to the concept and method concerned. It would be helpful for avoiding some of possible obsession from the variational procedure and its final quantum result.4 pages, 2 figures; submitted to Chinese PhysicsOpticstext