Got a note yesterday from Pamela Miles, author of “Reiki: A Comprehensive Guide,” reminding me that PBS is airing a documentary about five children facing cancer–“A Lion in the House”–tonight and Thursday evening. “Seeing others’ conflicts and pain helps us confront the universality of suffering and make peace with it even as we try to assuage it,” she says, adding this quote from Shunryu Suzuki: “The only way you can endure your pain is to let it be painful.”