Human reason has the peculiar fate in one species of its cognitions that it is burdened with questions which it cannot dismiss, since they are given to it as problems by the nature of reason itself, but which it also cannot answer, since they transcend every capacity of human reason.

The yellow Indians do have a meagre talent. The Negroes are far below them, and at the lowest point are a part of the American people.

The busier we are, the more acutely we feel that we live, the more conscious we are of life.

The death of dogma is the birth of morality.

Religion is the recognition of all our duties as divine commands.

Thinking in pictures precedes thinking in words.

All human knowledge begins with intuitions, proceeds from thence to concepts, and ends with ideas.