Organs, faculties, powers, capacities, or whatever else we call them; grow by use and diminish from disuse, it is inferred that they will continue to….

Any one who studies the state of things which preceded the French Revolution will see that that tremendous catastrophe came about from so excessive a….

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

A function to each organ, and each organ to its own function, is the law of all organization..

It must be admitted that the conception of virtue cannot be separated from the conception of happiness-producing conduct..

Those who have never entered upon scientific pursuits know not a tithe of the poetry by which they are surrounded..

The authoritarian sets up some book, or man, or tradition to establish the truth. The freethinker sets up reason and private judgment to discover the….

The wise man must remember that while he is a descendant of the past, he is a parent of the future..

Of all the knowledge, that most worth having is knowledge about health! The first requisite of a good life is to be a healthy person..

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..

The defects of the children mirror the defects of the parents..

This survival of the fittest which I have here sought to express in mechanical terms, is that which Mr. Darwin has called "natural selection", or the….

The great aim of education is not knowledge but action..

No one can be perfectly happy till all are happy..

All socialism involves slavery..

Music ministers to human welfare more than any other art..

So long as selfishness makes government needful at all, it must make every government corrupt, save one in which all men are represented..

If a single cell, under appropriate conditions, becomes a man in the space of a few years, there can surely be no difficulty in understanding how, un….

Regarding language as an apparatus of symbols for the conveyance of thought, we may say that, as in a mechanical apparatus, the more simple and the b….

Music may appeal to crude and coarse feelings or to refined and noble ones; and in so far as it does the latter it awakens the higher nature and work….

The greatest of all infidelities is the fear that the truth will be bad..