I believe it was Gayelord Hauser, the nutritionist, who said that “you are what you eat,” but if you happen to be an intellectual, you are what you quote. – Joseph Epstein, “Quotatious,” A Line Out for a Walk: Familiar Essays, 1991

A learned historian declared to me of a contemporary, that the latter had appropriated his researches; he might, indeed, and he had a right to refer to the same originals; but if his predecessor had opened the sources for him, gratitude is not a silent virtue. – Isaac D’Israeli, “Quotation,” A Second Series of Curiosities of Literature

When two seemingly conflicting thoughts have made it to proverb or aphorism status, usually, in the ambivalence of life, both are true. – Robert Irvine Fitzhenry (1918–2008), The Harper Book of Quotations