There is one blameless person whom I cannot love and have no excuse for hating.
 Oliver Wendell Holmes Sr., The Poet at the Breakfast-Table (1872). copy citation

Context

“—My heart does not warm as it should do towards the persons, not intimates, who are always too glad to see me when we meet by accident, and discover all at once that they have a vast deal to unbosom themselves of to me. —There is one blameless person whom I cannot love and have no excuse for hating. It is the innocent fellow-creature, otherwise inoffensive to me, whom I find I have involuntarily joined on turning a corner. I suppose the Mississippi, which was flowing quietly along, minding its own business, hates the Missouri for coming into it all at once with its muddy stream.” source