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).