Many of the people who live near my apartment are incredibly wealthy. The parking lots are filled with fancy cars, perhaps not ever remembered by their owners, that are covered in dust.
It can foster a bit of ill will to the other people around them, especially those with less money. We are taught to love our neighbors as ourselves, but it is much easier said than done.
This message of loving your neighbor and not holding a grudge is so important because it is so difficult! This is why it is mentioned so many times in the Bible.
Holding a grudge is a pestilence to all true believers. There is a famous quote that is a good summation of a grudge: "grudges are like swallowing poison and hoping your enemy dies from it".
This negative feeling that we carry towards another person is mostly reflected on our own disposition. The Proverbs mention that here: holding a grudge is a way to devise evil. Mercy and truth are how to devise good.
It may be difficult to reflect and understand the importance of these messages because we hear them so often, but they are said so often because of their importance
