When the people we once treated with kindness betray us, we lose all compassion. This causes us to lack a sense of realization of helping one another. At a later stage in life, we are not able to jduge when to help and when not to or for that matter, whom to help.
Beware that you don’t miss out on helping someone who really needed your help.
Let not the innocent be punished for the way someone else wronged you.