Jay Silverstein

“Freeman and slave, patrician and plebeian, lord and serf, guild-master and journeyman, in a word, oppressor and oppressed, stood in constant opposition to one another, carried on an uninterrupted, now hidden, now open fight, a fight that each time ended, either in a revolutionary re-constitution of society at large, or in the common ruin of the contending classes.”
― Karl Marx, The Communist Manifesto

“In other words, after the laws of physics, everything else is opinion.”
― Neil deGrasse Tyson, Astrophysics for People in a Hurry

“The task is ... not so much to see what no one has yet seen; but to think what nobody has yet thought, about that which everybody sees.”
― Erwin Schrodinger