My body was tranquil and undisturbed, my mind concentrated and unified. —The Buddha MN 4.22 (i 21) Tranquility is both a gift of meditation practice and a support for deepening the practice. As a gift, it can be healing and confidence-producing. As a support, it provides a sense of well-being that nourishes concentration and mental harmony. Meditative tranquility is a compelling state that can involve feelings of peace, calm, serenity, contentment, and deep rest.