Of the Concept of an Object of Pure Practical Reason (Chap. 2.1)
Immanuel Kant
The Portrait of a Lady (Chap. 40)
Henry James
Institutes of the Christian Religion (Book 2: Chapter 5)
John Calvin
On the Improvement of Understanding - First Part of Method Ch. 2
Benedict de Spinoza
State of the Union 1925
Calvin Coolidge
Nobel Lecture in Physics (1926): Colour Photography (Perrin)
Jean Baptiste Perrin
Metaphysics (Book 4)
Aristotle
The Marrow of Tradition (Chap. 17)
Charles Chesnutt
Under the Greenwood Tree (Chap. 2.6)
Thomas Hardy