Lie down on your back with your arms and legs stretched out comfortably. Imagine your body starting to dissolve and slowly turning to ash. All that is left is your physical heart, beating, and your mind, which inhabits your heart. From this point, your mind starts to regenerate new thoughts, which create new emotions, which create in turn a new, more complete physical body free from selfishness.
— Christopher Hansard in The Tibetan Art of Positive Thinking