The minds that are still wandering along the path of yoga and haven't realize what is going on in the mind need to practice forgiveness and letting go, as there is an ego being there thinking and believing that it is hurt by something hurtful, and so, it believes that it needs to be healed from hurt.
The emotional pain or hurts manifested in the form of thinking/feeling/thought process appear to be existing and real to the mind is due to ignorance.
The minds that know what is going on in the mind, that know the truth of 'emotional pain' and 'hurts', don't need to forgive, or let go, or be healed.
The thinking faculty that is free from ignorance and egoism cannot be hurt by anything. There's no emotional pain or hurt existing in this mind void of ignorance and egoism. There's nothing need to be forgiven, to let go, or to be healed.