Dictatorship naturally arises out of democracy, and the most aggravated form of tyranny and slavery out of the most extreme liberty.
Plato

Emancipate yourselves from mental slavery, none but ourselves can free our minds!
Bob Marley

Whenever I hear anyone arguing for slavery, I feel a strong impulse to see it tried on him personally.
Abraham Lincoln

If you allow one single germ, one single seed of slavery to remain in the soil of America... that germ will spring up, that noxious weed will thrive, and again stifle the growth, wither the leaves, blast the flowers and poison the fair fruits of freedom.
Ernestine Rose

Excess of liberty, whether it lies in state or individuals, seems only to pass into excess of slavery.
Plato

Elimination of illiteracy is as serious an issue to our history as the abolition of slavery.
Maya Angelou

The wealthy have never liked to pay for the labor that enriches them. Ever since slavery was eliminated, they have been trying to keep it as close to slavery as they can without violating the slave laws.
Michael Moore

No trace of slavery ought to mix with the studies of the freeborn man. No study, pursued under compulsion, remains rooted in the memory.
Plato