Grudges happen when we feel wronged and when 'unfair' is inflicted on us. We seek to right the wrong by nursing the memory of the event or the person for a long time, implicitly hoping that such nursing will 'right'...
Curiosity is a human trait that has brought progress to human kind through the centuries. So, it is innate in you and me. Honing curiosity is super critical survival skill. Lets find out how