The reason the person could not win the gold medal is not because he did not have the heart and mind.
He couldn't win the gold medal because his body could not keep up even though his heart wanted it.
Do you think a weight lifter cannot lift the weight at the world weightlifting competition because he does not have the heart? He can’t lift it because his body is weak.
If the ‘brain’ is weak and the ‘body’ is weak, you cannot do it even if your heart wants it.
If you make your brain and body into a normal [brain and body] by improving your constitution, your heart becomes normal too.