How many machines do the world's engineer discovers, but one can discover the machine to understand the pain of the mind?

Each of us has a different thing in our mind, which hinders us all and raises a question in front of us.
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At one time, we suffer a lot due to emotional pain. But there will be no pain in life. Once my Mind will say, why would you hurt yourself with one thing, forget all that But forgetting is not so easy. Yet everyone wants to forget the moment of trouble.
How many different types of machines the world engineer discovers, but no one has ever invented the machine to understand the pangs of the mind, can not even be in the future. Occasionally I think there was a need to discover such a portable device.