Another not uncommon victim of persecution mania is a certain type of philanthropist, who is always doing good to people against their will, and is amazed and horrified that they display no gratitude. Our motives in doing good are seldom as pure as we imagine them to be. Love of power is insidious; it has many disguises, and is often the source of the pleasure we derive from doing what we believe to be good to other people.

Bertrand Russell (1872-1970) English mathematician and philosopher

Conquest of Happiness, Part 1, ch. 8 “Persecution Mania” (1930)
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See Stevenson.