Slaves are generally expected to sing as well as to work ... I did not, when a slave, understand the deep meanings of those rude, and apparently incoherent songs. I was myself within the circle, so that I neither saw nor heard as those without might see and hear. They told a tale which was then altogether beyond my feeble comprehension: they were tones, loud, long and deep, breathing the prayer and complaint of souls boiling over with the bitterest anguish. Every tone was a testimony against slavery, and a prayer to God for deliverance from chains.Frederick Douglass