The yogi did not bleed

The following story comes from Deepak Chopra.  You have to ask him if the story is true or not.

When Deepak was a young medical student in India, a yogi came to his physiology lab and did a startling demonstration.

The yogi stabbed a knife into his own biscep, and did not bleed.  Note, yogi means the union of body, mind and spirit.  To a skillful yogi, a body is the body of conscious not the body of flesh.

A doctor who was the medical professor mocked the yogi, “What other trick do you still have?”

As the yogi heard of these words and became angry, his flesh began to bleed.  But then, he realized that he had allowed his ego to emerge so that the flesh blended; he went back to his spirit self, and the bleeding stoped.

This story is quite amazing if it is true.