“I am in limbo, and in limbo there are no races, no prizes, no changes, no chances. There are merely degrees of endurance, and endurance never was my strong point.”

Source: Faith vs. Fact (2015), p. 71

Source: Zeitoun

Prometheus Unbound

Part II, section 1.
Evangeline: A Tale of Acadie (1847)

Variant: What could not be changed must be endured.
Source: New Spring (January 2004), Chapter 1: The Hook. p. 5

Villa Franca.
Bartlett's Familiar Quotations, 10th ed. (1919)

Essentials to Peace (1953)
Context: A very strong military posture is vitally necessary today. How long it must continue I am not prepared to estimate, but I am sure that it is too narrow a basis on which to build a dependable, long-enduring peace. The guarantee for a long continued peace will depend on other factors in addition to a moderated military strength, and no less important. Perhaps the most important single factor will be a spiritual regeneration to develop goodwill, faith, and understanding among nations. Economic factors will undoubtedly play an important part. Agreements to secure a balance of power, however disagreeable they may seem, must likewise be considered. And with all these there must be wisdom and the will to act on that wisdom.

Epistulae Morales ad Lucilium (Moral Letters to Lucilius), Letter CVII: On Obedience to the Universal Will