Even without you resorting to 'frightening, oppressing, or tormenting', the sting originating from your heart still does not subside.

This couplet speaks to a deep, lingering pain or 'sting' that remains, even when the person causing it didn't use any harsh methods like fear, oppression, or torture. It suggests that the wound inflicted wasn't from deliberate malice, but perhaps from a more subtle interaction, an unintentional slight, or even simply the other person's nature or presence. The pain is felt profoundly, despite the absence of overt cruelty, highlighting how emotional hurt can arise in complex and unexpected ways. It's a poignant reflection on suffering that isn't always caused by direct aggression.