Heine

“I am afraid we must make the world honest before we can honestly say to our children that honesty is the best policy.”
― George Bernard Shaw

“Nobody is more dangerous than he who imagines himself pure in heart; for his purity, by definition, is unassailable.”
― James Baldwin

“Give me the liberty to know, to utter, and to argue freely according to conscience, above all liberties.”
― John Milton , Areopagitica

“For books are not absolutely dead things, but do contain a potency of life in them to be as active as that soul was whose progeny they are; nay, they do preserve as in a vial the purest efficacy and extraction of that living intellect that bred them.”
― John Milton, Areopagitica