These are two gems that also include many more links/perspectives on Jesus to noodle out on.
http://egodeath.com/JesusFigureEsotericOrigin.htm
All the no-Jesus researchers agree that there was no Jesus; Jesus was instead a matter of esoteric allegory. But that replaces a misunderstanding by an unknown: what are no-Jesus researchers proposing when they propose that the Jesus figure was a matter of "esoteric allegory"? One simple, materialist answer: "it means annual fertility of crops, which filled the simple-minded ancients with great fear and awe and a deep religious sense of dependency.
An equivalent alternative answer: "it means the sun and astrology/cosmology. The ancients really thought astrology was interesting, and useful for crops, navigation, and prediction."
Those meanings are very important, but they omit the most essential spirit of the matter. The answers miss a certain essential quality of what astrology/cosmology and fertility meant. Those answers are correct as far as they go, which isn't very far, given that they omit mystic-state, psychological experiencing, which ignited these fields and brought them alive, brought them down to earth below, into the heart of the individual psyche. Theorists of 'Tradition' agree with this view to some extent, which I am trying to identify.
Proponents of "Jesus as visionary plant minister" or "Jesus as visionary plant" say their proposed meaning is a better candidate; that it makes more sense to centralize the amanita cap than the sun as real, ultimate, uber-referent of the Jesus figure. There is some truth to that argument, because the visionary plant is closer to psychological phenomena than the sun is, because the plant produces the phenomena.
However, even more central must be the allegorized psychological phenomena themselves – the experience of the sun-like white-light phenomenon in the psyche; the experience of spacetime crucifixion in the psyche. Therefore I agree that the sun doctrine could be a revealed secret, but only weakly, and that visionary plants could be a somewhat more hidden and profound secret, but that the ultimate hidden and revealed, most profound secret must be the experiential intense mystic-state phenomena in the individual psyche.
About the "lost years" where supposedly spent that time in India:
http://reluctant-messenger.com/issa.htm
I like this quote:
At this time, an old woman approached the crowd, but was pushed back. Then Issa said, "Reverence Woman, mother of the universe,' in her lies the truth of creation. She is the foundation of all that is good and beautiful. She is the source of life and death. Upon her depends the existence of man, because she is the sustenance of his labors. She gives birth to you in travail, she watches over your growth. Bless her. Honor her. Defend her. Love your wives and honor them, because tomorrow they shall be mothers, and later-progenitors of a whole race. Their love ennobles man, soothes the embittered heart and tames the beast. Wife and mother-they are the adornments of the universe."
"As light divides itself from darkness, so does woman possess the gift to divide in man good intent from the thought of evil. Your best thoughts must belong to woman. Gather from them your moral strength, which you must possess to sustain your near ones. Do not humiliate her, for therein you will humiliate yourselves. And all which you will do to mother, to wife, to widow or to another woman in sorrow-that shall you also do for the Spirit."