On first blush, Harriet Tubman and Sojourner Truth look like sisters from a different mister. Both were born into slavery. Both escaped. Both turned right back around and worked to end slavery.

That's where they start to differ. Sojourner spoke, preached, and generally worked on stage in the abolitionist movement. Harriet was more of a behind the scenes type. She was arguably the most successful conductor on the Underground Railroad, physically risking her life to shepherd escaped slaves to safety.

She and Sojourner shared a devout faith that God would help end the injustice of slavery, although Harriet actually worked with John Brown, who was a bit too violent (read: way too violent) for Sojourner Truth.