Baraka_Guru

Good luck going from the four humours to the human genome. Your steps 3 through 10, however, are feasible enough with your intelligence. But you have these first two stumbling blocks.

I hope you enjoy swallowing astrology among other things while becoming a medieval physician. Even if you get that far, I doubt you could bring medicine "up to speed" within your lifetime. I think your attempts would have you tortured and executed. Why not also tell them that the earth isn't the centre of the universe and how it's physically possible to touch the stars?

Will, have you not studied medieval history in any capacity? I'm sorry if I sound pessimistic; I'm just concerned about your safety.

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Knowing that death is certain and that the time of death is uncertain, what's the most important thing?
—Bhikkhuni Pema Chödrön

Humankind cannot bear very much reality.
—From "Burnt Norton," Four Quartets (1936), T. S. Eliot