At present, intelligent people do not have their children vaccinated, nor does the law now compel them to. The result is not, as the Jennerians prophesied, the extermination of the human race by smallpox; on the contrary more people are now killed by vaccination than by smallpox.
Instruction in sex is as important as instruction in food; yet not only are our adolescents not taught the physiology of sex, but never warned that the strongest sexual attraction may exist between persons so incompatible in tastes and capacities that they could not endure living together for a week much less a lifetime.
A modern gentleman [rich person] is necessarily the enemy of his country. Even in war he does not fight to defend it, but to prevent his power of preying on it from passing to a foreigner.
Religion is a great force - the only real motive force in the world; but what you fellows don't understand is that you must get at a man through his own religion and not through yours.
Democracy means the organization of society for the benefit and at the expense of everybody indiscriminately and not for the benefit of a privileged class.
The danger of crippling thought, the danger of obstructing the formation of the public mind by specially suppressing ... representations is far greater than any real danger that there is from such representations.
Bible worship, though at its best it may achieve sublimity by keeping its head in the skies, may also make itself both ridiculousand dangerous by having its feet off the ground.