"Do not say, 'I will do to him just as he has done to me; I will render to the man according to his work.'" (Prov. 24:29)

After a particularly lousy landing by the co-pilot of an Australian commercial airline, that co-pilot heard the Captain say into his microphone, "Ladies and gentlemen, XXX airlines wishes to apologize for that rough landing provided today by our first officer."

Some months later, the same crew were together and, you guessed it, the Captain had an even worse landing. The First Officer immediately jumped on the intercom announcing, "Ladies and gentlemen, XXX airlines wishes to apologize for that rough landing provided today by our Captain." The Captain immediately responded angrily, "What did you say that for?" The First Officer replied, "Remember a couple of months back? I owed it to you!" "But I never keyed the mike!" responded the Captain. (From Australian Aviation Magazine)

Lev. 19:18 says, "You shall not take vengeance, nor bear any grudge against the children of your people, but you shall love your neighbor as yourself: I am the LORD."