Moral truth, resting entirely upon the ascertained consequences of actions, supposes a process of observation and reasoning.

The knowledge of one generation is the ignorance of the next.

So long as the mental and moral instruction of man is left solely in the hands of hired servants of the public--let them be teachers of religion, professors of colleges, authors of books, or editors of journals or periodical publications, dependent upon their literary incomes for their daily bread, so long shall we hear but half the truth; and well if we hear so much. Our teachers, political, scientific, moral, or religious; our writers, grave or gay, are compelled to administer to our prejudices and to perpetuate our ignorance.

Trust me, there are as many ways of living as there are men, and one is no more fit to lead another, than a bird to lead a fish, or a fish a quadruped.

There is but one honest limit to the rights of a sentient being; it is where they touch the rights of another sentient being.

Fathers and husbands! do ye not also understand this fact? Do ye not see how, in the mental bondage of your wives and fair companions, ye yourselves are bound?

You have heard of, and studied various systems of philosophy; but real philosophy is opposed to all systems.