“Greed redefined and corrupted what true power is. Domination is for the weak, Harmony is the true sign of strength.”

Source: Your Forces and How to Use Them (1912), Chapter 14, p. 210

Source: The Postman (1985), Section 3, “Cincinnatus”, Chapter 14 (p. 267)
Variant: It is said that power corrupts, but actually it’s more true that power attracts the corruptible. The sane are usually attracted by other things than power.
As quoted in Values of the Wise: Humanity's Highest Aspirations (2004) by Jason Merchey, p. 120
This is very similar to the expression by Frank Herbert in Chapterhouse: Dune (1985): "All governments suffer a recurring problem: Power attracts pathological personalities. It is not that power corrupts but that it is magnetic to the corruptible. Such people have a tendency to become drunk on violence, a condition to which they are quickly addicted."
Context: It’s said that “power corrupts,” but actually it’s more true that power attracts the corruptible. The sane are usually attracted by other things than power. When they do act, they think of it as service, which has limits. The tyrant, though, seeks mastery, for which he is insatiable, implacable.

Examples of self-translation (c. 2004), Quotes - Zitate - Citations - Citazioni

Source: The Ordeal of Change (1963), Ch. 2: "The Awakening of Asia" This passage uses phrases from his earlier work 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. We cannot win the weak by sharing our wealth with them. They feel our generosity as oppression. St. Vincent De Paul cautioned his disciples to deport themselves so that the poor "will forgive them the bread you give them."

Variant translation by Lin Yutang: "He who knows others is learned; he who knows himself is wise".
Source: Tao Te Ching, Ch. 33, as interpreted by Stephen Mitchell (1992)

Source: Words of Radiance

As quoted in Sexuality and Gender (2002) by Christine R. Williams and Arlene Stein, p. 213
Context: The feminist line is, strippers and topless dancers are degraded, subordinated, and enslaved; they are victims, turned into objects by the display of their anatomy. But women are far from being victims — women rule; they are in total control … the feminist analysis of prostitution says that men are using money as power over women. I'd say, yes, that's all that men have. The money is a confession of weakness. They have to buy women's attention. It's not a sign of power; it's a sign of weakness.

Source: Steps to an Ecology of Mind (1972), p. 494