How the black man embraced Christianity

[Rev. Rye]

Well, technically, that's one of the ways the black man embraced Christianity. It's not quite the Ur-document the image macro is claiming because, the book shown, and originally entitled The Religious Instruction of the Negroes in the United States was published in 1843. While that may very well have been an influential text on getting the slaves addicted to the opium of the masses, it's too young to be THE text on disseminating it, especially considering that over a century earlier, United Society Partners in the Gospel, as well as many Great Awakening preachers, were making damn good headway in bringing the gospel to slaves (and, of course, twisting it to their own ends to make them more compliant.) As a matter of fact, Nat Turner, leader of the infamous slave rebellion of 1831, was a devout (if unorthodox) Christian:

And on the 12th of May, 1828, I heard a loud noise in the heavens, and the Spirit instantly appeared to me and said the Serpent was loosened, and Christ had laid down the yoke he had borne for the sins of men, and that I should take it on and fight against the Serpent, for the time was fast approaching when the first should be last and the last should be first.

This vision happened 15 years before the book in the OP was published.