The old grudges you've been carrying around for so long: aren't they getting to be heavy? It is more than okay to let go: it's necessary. Are you keeping this event or person in your emotional bank account in the hopes that some day you can cash it in for a sense of revenge? That is no reason to take up valuable space in your heart. Get rid of the bad energy or memories by turning toward the future, not looking back. Make room in your heart for new, positive forces.