Who made the argument that whites "must necessarily appear to them in the nature of supernatural beings- We approach them with the might of a deity"?

Kurtz made this argument in his writings. Marlowe is moved by his eloquence.

"But it was a beautiful piece of writing. The opening paragraph, however, in the light of later information, strikes me now as ominous. He began with the argument that we whites, from the point of development we had arrived at, 'must necessarily appear to them [savages] in the nature of supernatural beings - we approach them with the might of a deity,' and so on, and so on. 'By the simple exercise of our will we can exert a power for good practically unbounded,' etc., etc. From that point he soared and took me with him.