Your body is a vessel, a container for this 3d dimension. "You" are an energy within a biochemical reaction within the body's brain. That would be the technical description, but there is more to man.

Unusual creativity offset by a capacity for unmatched savagery. Capable of stepping outside of oneself with love and compassion while also embodying the capability for exceptional greed and avarice. Potential for good: incredible. Potential for evil: also incredible.

Which version of man does an alien presence meet? Will an aware mankind be a partner who trades their creativity for knowledge and in so doing devise new concepts and uses for the knowledge or will mankind pervert knowledge to evil uses, continuing his history of killing and enslaving his own kind?

No advanced civilization wants to be the owner of the pet python that strangles him to death. Mankind is the cute and cuddly little creature that is so adorable, yet has a poisonous bite. If man could just lose the poison....