Most of Morrnah's original teachings have been "lost" or extensively altered by Stan Hew Len, Joe Vitale, Mabel Katz in recent years, but I believe Stan still includes some of it in the weekend training they're doing now.
Huna contains elements of philosophy, science, and religion. We often speak of Huna as not in itself a religion, but the truth which lies behind all religions alike. It is a science because it explains spiritual/metaphysical matters not as theological belief, but of direct knowledge obtainable by study and ivestigation. It's religious aspect gives Huna "followers" or practitioners a rule of life... not based on alleged "commands" given to the "chosen" at some remote period in the past, but on plain common sense as indicated by observable facts. The "Divine Will" is expressed in what we know as the laws of Nature.