Who said "The great work of the age is the abolition of slavery."?

This quote is attributed to Frederick Douglass.

The great work of the age is the abolition of slavery. - Frederick Douglass

"The great work of the age is the abolition of slavery."

Frederick Douglass

Abolitionist, Orator American 1818–1895

"It is not the color of the skin that makes a man a slave or a free man, it is the condition of his mind."

"Once you learn to read, you will be forever free."

"If there is no struggle, there is no progress."

"I am not included within the pale of this glorious anniversary! Your high independence only reveals the immeasurable distance between us."