That the ulterior significance of every mode of human association lies in the contribution which it makes to the improvement of the quality of experience is a fact most easily recognized in dealing with the immature.

Everything depends on the quality of the experience which is had.

Without initiation into the scientific spirit one is not in possession of the best tools which humanity has so far devised for effectively directed reflection. One in that case not merely conducts inquiry and learning without the use of the best instruments, but fails to understand the full meaning of knowledge.

The only freedom that is of enduring importance is the freedom of intelligence, that is to say, freedom of observation and of judgment, exercised in behalf of purposes that are intrinsically worth while. The commonest mistake made about freedom is, I think, to identify it with freedom of movement, or, with the external or physical side of activity.

There is no god and there is no soul. Hence, there is no need for the props of traditional religion. With dogma and creed excluded, then immutable truth is dead and buried. There is no room for fixed and natural law or permanent moral absolutes.

Teaching can be compared to selling commodities. No one can sell unless someone buys ... yet there are teachers who think they have done a good day's teaching irrespective of what the pupils have learned.

most notable distinction between living and inanimate beings is that the former maintain themselves by renewal.