“In science the important thing is to modify and change one’s ideas as science advances.”

We all decry prejudice, yet are all prejudiced.

Society exists for the benefit of its members, not the members for the benefit of society.

Volumes might be written upon the impiety of the pious.

The ultimate result of shielding men from the effects of folly, is to fill the world with fools.

Science is organized knowledge.

What a cage is to the wild beast, law is to the selfish man.

When a man’s knowledge is not in order, the more of it he has the greater will be his confusion.

Life is the continuous adjustment of internal relations to external relations.

Civilization is a progress from an indefinite, incoherent homogeneity toward a definite, coherent heterogeneity.

How often misused words generate misleading thoughts.

We do not commonly see in a tax a diminution of freedom, and yet it clearly is one.

The behavior of men to the lower animals, and their behavior to each other, bear a constant relationship.

Government is essentially immoral.

No one can be perfectly free till all are free; no one can be perfectly moral till all are moral; no one can be perfectly happy till all are happy.

Love is life’s end, but never ending. Love is life’s wealth, never spent, but ever spending. Love’s life’s reward, rewarded in rewarding.

People are beginning to see that the first requisite to success in life is to be a good animal.