Necessity, Persian proverb

Necessity turns lion into fox.

- Persian proverb, as quoted in The International Thesaurus of Quotations (1970) edited by Rhoda Thomas Tripp, p. 428

http://en.wikiquote.org/wiki/Necessity

Necessity, Abigail Adams

These are times in which a genius would wish to live. It is not in the still calm of life, or in the repose of a pacific station, that great characters are formed. The habits of a vigorous mind are formed in contending with difficulties. Great necessities call out great virtues. When a mind is raised, and animated by the scenes that engage the heart, then those qualities which would otherwise lay dormant, wake into life and form the character of the hero and the statesman.

- Abigail Adams, in a letter to John Quincy Adams (19 January 1780)