I would permit no man, no matter what his colour might be, to narrow and degrade my soul by making me hate him.
Booker T. Washington (1856-1915) American educator, writer
Up from Slavery, ch. 11 (1901)
(Source)
This has been paraphrased in various ways, and is the source of Martin Luther King, Jr's quote he attributed to Washington: "Let no man pull you so low as to make you hate him" (e.g., Stride Toward Freedom, ch. 6 (1958)). King used this or variants of this paraphrase frequently in his speeches, though it was only in his early activism that he referenced Washington by name.