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I'm not sure if you meant "If you were Jesus coming back from Heaven" or "If you were Jesus, living in the first century, and were suddenly brought to our time".
If you meant the first one, then I would care for the sick, punish those who prey on others and provide for those in need.
If you meant the second, then I think that if I were Jesus and I walked into the world the way it is now that I would be completely overwhelmed by the many ways the world has changed since the Pax Romana.
I also suspect that I would be saddened to learn the many terrible things that have been done in my name.
If you meant the first one, then I would care for the sick, punish those who prey on others and provide for those in need.
If you meant the second, then I think that if I were Jesus and I walked into the world the way it is now that I would be completely overwhelmed by the many ways the world has changed since the Pax Romana.
I also suspect that I would be saddened to learn the many terrible things that have been done in my name.