It's good to always forgive and forget, although we can't keep moving all the time without offending each other, but we should find a place in our heart to always forgive and forget.
The tides of time might turn, you can also be in the position, so always judge right.
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So if anyone has hurt you, take it as something usual and forgive the person.
And always expect disappointment from everybody you come across so that it won't be difficult to forgive them when they wrong you.