Knowledge makes a man unfit ...

Knowledge makes a man unfit to be a slave.
Knowledge makes a man unfit to be a slave.

More phrases

If one does not know to which port one is sailing, no wind is favorable.
What a distressing contrast there is between the radiant intelligence of the child and the feeble mentality of the average adult.
We are masters of the unsaid words, but slaves of those we let slip out.
I have always found that mercy bears richer fruits than strict justice.
A lie gets halfway around the world before the truth has a chance to get its pants on.

Quotes from the same author

If there is no struggle, there is no progress.
I prefer to be true to myself, even at the hazard of incurring the ridicule of others, rather than to be false, and to incur my own abhorrence.
No man can put a chain about the ankle of his fellow man without at last finding the other end fastened about his own neck.
What to the Slave is the 4th of July.
A great man, tender of heart, strong of nerve, boundless patience and broadest sympathy, with no motive apart from his country.