The "Mother Teresa Effect"
Seeing a film about Mother Teresa raised S-IgA, immunoglobin A in saliva, a marker of the immune system, in 132 Harvard students. She was walking; she was not speaking in English. (Study by Dr. David McClelland of Harvard University)
This is the effect of being moved in one's heart. Heart Rhythm Meditation focuses on the heart and produces strong emotions of compassion and love.
Heart Rhythm Meditation produces entrainment, and entrainment has been shown in a research study to produce the Mother Teresa Effect.