Drill down into our database of quotes.

Roosevelt, Theodore, Jr. "The Strenuous Life." Selected Speeches and Writings of Theodore Roosevelt, edited by Gordon Hutner. Vintage, 2014.

Smith, Adam. The Theory of Moral Sentiments, edited by Ryan Patrick Hanley. Penguin, 2010, pt. 2, sect. 3, ch. 1.

Aristophanes. "The Knights." The Birds and Other Plays, translated by Alan H. Sommerstein. Penguin Classics, 2003.

Hamilton, Alexander. "No. I: Deliberation on a new constitution--Hamilton." The Federalist: A Commentary on the Constitution of the United States, edited by Robert Scigliano. The Modern Library, 2001.

Lord Byron. "Childe Harold's Pilgrimage." Lord Byron: The Major Works, edited by Jerome J. McGann. Oxford University Press, 2008, canto 3, st. 8.

Madison, James. "No. 51: How to maintain: make the parts check each other. Also, a federal system divides power further.--Madison (or Hamilton)." The Federalist: A Commentary on the Constitution of the United States, edited by Robert Scigliano. The Modern Library, 2001.

Du Bois, William Edward Burghardt. The Souls of Black Folk, edited by Brent Hayes Edwards. Oxford University Press, 2009, ch. 1.

Cather, Willa. The Song of the Lark. Vintage, 1999, pt. 4, ch. 8.

Wordsworth, William. "My heart leaps up when I behold." William Wordsworth: The Major Works: including The Prelude, edited by Stephen Gill. Oxford University Press, 2008.

Yeats, W. B. "A Song." W. B. Yeats: The Major Works, edited by Edward Larrissy. Oxford University Press, 2008.

Carus, Titus Lucretius. The Nature of Things, translated by Alicia Stallings. Penguin Classics, 2007, bk. 2, l. 1.