As I would not be a slave, so I would not be a master. This expresses my idea of democracy. Whatever differs from this, to the extent of the difference, is no democracy.

Definition of Democracy; see Roy P. Basler, ed., The Collected Works of Abraham Lincoln, vol. 2 (New Brunswick, N.J.: Rutgers University Press, 1953), p. 532

Collected Works of Abraham Lincoln. Volume 2.[quod.lib.umich.edu]