What is one theme of Phillis Wheatley's "On Being Brought from Africa to America"?

People of all colors can be redeemed by God.
Slavery goes against God's laws.
God is removed from the daily lives of humans.
Slave traders will someday be enslaved by God.

Which quote best supports your answer to the last question?
"Once I redemption neither sought nor knew,
Some view our sable race with scorful eye,
Their color is a diabolic die.
Twas mercy brought me from my Pagan land,
Taught my benighted soul to understand
That there's a God, that there's Savior too".
*Remember, Christians, Negroes, black as Cain,
May be refin'd, and join th' angelic train.