NEIGHBOR, n. One whom we are commanded to love as ourselves, and who does all he knows how to make us disobedient.
Ambrose Bierce (1842-1914?) American writer and journalist
“Neighbor,” The Devil’s Dictionary (1911)
(Source)
Originally published in the "Cynic's Word Book" column in the New York American (1904-09-23) and the "Cynic's Dictionary" column in the San Francisco Examiner (1904-10-04).