Progress, therefore, is not an accident, but a necessity…It is a part of nature.

Without painting, sculpture, music, poetry, and the emotions produced by natural beauty of every kind, life would lose half its charm.

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

So far from science being irreligious, as many think, it is the neglect of science that is irreligious-it is the refusal to study the surrounding creation that is irreligious.

Agnostics are people who, like myself, confess themselves to be hopelessly ignorant concerning a variety of matters, about which metaphysicians and theologians, both orthodox and heterodox, dogmatize with the utmost confidence.

That feelings of love and hate make rational judgments impossible in public affairs, as in private affairs, we can clearly enough see in others, though not so clearly in ourselves.

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