john powell’s Affirmative Mindfulness To counter our tendency to segregate, powell looks at how mindfulness can help us overcome fears of others and the anger and racism they generate. By Carsten Knox April 14, 2014 Compassion Photograph by Jim Block At 6’3″, john a. powell (who spells his name without capitals) is a strong presence. He Unlock this article for FREE. Keep Reading Log in to your Mindful account for uninterrupted access.