Back in the day spacemen came down and setup a biosphere on planet earth.
The new colonists (Adam and Eve) tried earth produce, thus contaminating them with local bacteria, so they ended up stuck on Earth, and so the world was populated.
Then, you'll have heard about Noah, he was one a group of scientist who heard about deteriorating weather patterns, so they gene sequenced as much flora and fauna before the weather patterns failed completely. They fled in a spaceship. Once the weather had settled down they returned and re-stocked the earth to the best of their abilities.
Some time passed…
An off planet survey group came to check up on the Earth, arriving in a spaceship the planted it in low orbit. Then using EVA suits they came down to earth and impregnated a lady (jetpacks-wings, halo-helmet glint). She insisted to her doting husband that it was angels…
Following the successful birth the ship left low orbit using fusion drive, visible by the naked eye from earth.
The young lad 'J' grew up knowing he was special, not least as he was regularly communicated to by off planet beings. They taught him some key medical knowledge, and provided him with special equipment – he was also not genetically the same as most humans. This transpired into:
Healing the sick – with some (by today's standard) simple medical procedures.
Feeding the hungry – concentrated dehydrated rations and some water.
Living with the lepers (as they were called then) – not affected by human illnesses so much).
As his life continued the off world beings came in more contact, towards the end of his life they landed a craft in a local lake.
"J' rowed out then walked on the deck of the submerged ship, appearing to walk on water.
Eventually his antics became untrusted and so he was condemned to be crucified.
Being not fully human, typical capital punishments didn't fully terminate 'J', so when removed he was not completely dead.
Following a few days of recuperation, he used his off planet strength (the beings were from a hi-G world) to open the cave door and exit.
The off-planet observers took the opportunity to use a tractor beam to take 'J' off planet.
We've been talking about it ever since, and a long time later some folk wrote a book about it…