Describe cugoano's experience as he discusses his capture into slavery

Cugoano's experience was awful and unnerving in light of the fact that Cugoano was a child and that is difficult to experience.
A black abolitionist campaigner, who worked nearby Equiano, was Ottobah Cugoano. 1757 is the year of his birth, in the land of Africa now called Ghana. In 1770, he was captured and taken toward the West Indies, where he spent about a year subjugated on Grenada. Cugoano was conveyed to Britain in 1772 and soon ended up noticeably one of the pioneers of London's African people and their battle to end slavery.

:what is edwards's purpose for giving this sermon? which elements likely make the argument effective for a puritan audience?