“It was an amiable weakness.”

Vol. 1, Chap. 14. Compare: "Amiable weakness", Henry Fielding, Tom Jones, Book x, Chapter viii.
The Decline And Fall Of The Roman Empire: Volume 1 (1776)

Politics Drawn from the Very Words of Holy Scripture (1709)

Per Ahlmark, Former Deputy Prime Minister of Sweden (Liberal Party), in The Washington Times, November 1, 2002. http://web.archive.org/web/20030412193910/http://www.washtimes.com/commentary/20021101-47209425.htm

Speech made in honor of Thomas Mann in January 1939, when Mann was given the Einstein Prize given by the Jewish Forum. Quoted in Einstein Lived Here by Abraham Pais (1994), p. 214 http://books.google.com/books?id=u_9QAAAAMAAJ&q=%22becomes+lack+of+power%22#search_anchor
1930s
Context: The standard bearers have grown weak in the defense of their priceless heritage, and the powers of darkness have been strengthened thereby. Weakness of attitude becomes weakness of character; it becomes lack of power to act with courage proportionate to danger. All this must lead to the destruction of our intellectual life unless the danger summons up strong personalities able to fill the lukewarm and discouraged with new strength and resolution.

The Canon of Judo (1956, 1960)

pg 71
Source: The Unbearable Lightness of Being (1984), Part Two: Soul and Body

Section 42
The Passionate State Of Mind, and Other Aphorisms (1955)
Context: It has often been said that power corrupts. But it is perhaps equally important to realize that weakness, too, corrupts. Power corrupts the few, while weakness corrupts the many. Hatred, malice, rudeness, intolerance, and suspicion are the faults of weakness. The resentment of the weak does not spring from any injustice done to them but from the sense of inadequacy and impotence. They hate not wickedness but weakness. When it is their power to do so, the weak destroy weakness wherever they see it.

Source: The Bed of Procrustes: Philosophical and Practical Aphorisms (2010), p. 94