“Any group is weaker than a man alone unless they are perfectly trained to work together.”
Source: Starship Troopers
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Robert A. Heinlein 557
American science fiction author 1907–1988Related quotes

Source: "Notes on the Theory of Organization," 1937, p. 9-10

Bk. III, ch. 4.
1840s, Past and Present (1843)

Source: A Vindication of the Rights of Woman (1792), Ch. 3
Context: Should it be proved that woman is naturally weaker than man, from whence does it follow that it is natural for her to labour to become still weaker than nature intended her to be? Arguments of this cast are an insult to common sense, and savour of passion. The divine right of husbands, like the divine right of kings, may, it is to be hoped, in this enlightened age, be contested without danger, and though conviction may not silence many boisterous disputants, yet, when any prevailing prejudice is attacked, the wise will consider, and leave the narrow-minded to rail with thoughtless vehemence at innovation.

Source: The Warrior Within: The Philosophies of Bruce Lee (1996), p. 156

(Brownlow 1958, 290), as cited in: Mary E. Guy, Marilyn M. Rubin (2015), Public Administration Evolving. p. 222
A Passion for Anonymity, 1955

“b>A man is not independent unless he has the courage to stand alone.</b”
Sjálfstætt fólk (Independent People) (1935), Book Two, Part III: Conclusion
1970s - 1980s, interview with Deborah Salomon in 'New York Times', 1989

Annotation: It's unclear, whether this quote is from Hanyu himself or based on a commercial script, but it's commonly attributed to him.
Original: (ja) できなかったら、できるまでやる。できるようになったら、完璧にできるまでやる。完璧にできるようになったら、何度でも、完璧にできるまでやる。
Source: Attributed, Lines from a TV commercial for 味の素 アミノバイタル (AJINOMOTO amino VITAL), released on 1 October 2014, as quoted in フィギュアスケート14-15シーズン序盤号, published on 15 November 2014 by 日刊スポーツ新聞社 (Nikkan Sports News).