“Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to surrender, that is strength.”

From a 1982 interview with Boston Globe journalist Marian Christy. Christy, Marian. "Winning according to Schwarzenegger." https://secure.pqarchiver.com/boston/doc/294151457.html Boston Globe: Boston, MA. 9 May 1982: p 51. Accessed 25 Jun 2016.
1980s
Context: Strength does not come from winning. Your struggles develop your strengths. When you go through hardships and decide not to surrender, that is strength. When you make an impasse passable, that is strength. But you must have ego, the kind of ego which makes you think of yourself in terms of superlatives. You must want to be the greatest. We are all starved for compliments. So we do things that get positive feedback.

Speech in West Calder, Scotland (27 November 1879), quoted in W. E. Gladstone, Midlothian Speeches 1879 (Leicester University Press, 1971), p. 116.
1870s
Context: My fourth principle is—that you should avoid needless and entangling engagements. You may boast about them, you may brag about them, you may say you are procuring consideration of the country. You may say that an Englishman may now hold up his head among the nations. But what does all this come to, gentlemen? It comes to this, that you are increasing your engagements without increasing your strength; and if you increase your engagements without increasing strength, you diminish strength, you abolish strength; you really reduce the empire and do not increase it. You render it less capable of performing its duties; you render it an inheritance less precious to hand on to future generations.