Jupiter Hammon wrote the speech at age seventy-six after a lifetime of slavery in Long Island, New York. In the speech, Hammon gives his famous quote, "If we should ever get to Heaven, we shall find nobody to reproach us for being black, or for being slaves." 
Hammon was an extremely devout Christian and, as such, the speech draws heavily on Christian motifs and theology. For example, Hammon said that Black people should maintain their high moral standards precisely because being slaves on earth had already secured their place in heaven. Hammon's speech also promoted the idea of a gradual emancipation as a way of ending slavery.
It is thought that Hammon stated this plan because he knew that slavery was so entrenched in American society that an immediate emancipation of all slaves would be difficult to achieve.
Hammon apparently remained a slave until his death. His speech was initially published by the New York Quakers. After his death, his speech was widely reprinted and distributed by the Pennsylvania Society for Promoting the Abolition of Slavery.