There is a vitality, a life force, a quickening that is translated through you into action, and because there is only one of you in all time, this expression is unique. And if you block it, it will never exist through any other medium and be lost. The world will not have it.. Dance Film Based on Martha Graham's Vitality featuring Canadian Dancer and teacher Alayna Kellet. Narrated by Avaah Blackwell.