To withdraw is not to run away, and to stay is no wise action when there is more reason to fear than to hope. 'Tis the part of a wise man to keep himself today for tomorrow, and not venture all his eggs in one basket.

— Miguel de Cervantes El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

Source and credibility

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Source: Sancho to Don Quixote, in Ch. 9, (tr. Peter Anthony Motteux, 1701).
Work: El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha), 1605
Source quality: Precise citation Points to a specific work with a page, chapter, date or similar locator, so you can look it up.

El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

El ingenioso hidalgo don Quixote de la Mancha (The Ingenious Gentleman Don Quixote of La Mancha) (1605)

Los trabajos de Persiles y Sigismunda (The Travails of Persiles and Sigismunda) (1617)