I need to investigate the connection further ... but just read these words from Shunryu Suzuki
"To stop the mind does not mean to stop the activities of mind. It means your mind pervades your whole body. With your full mind you for the mudra in your hands."
" We say our practice should be without gaining ideas, without any expectations, even of enlightenment. This does not mean, however, just to sit without purpose.
This practice free from gaining ideas is based on the Prajna Paramita Sutra. However, if you are not careful the sutra itself will give you a gaining idea.
It says 'form is emptiness and emptiness is form.' But if you attach to that statement, you are liable to be involved in dualistic ideas: here is you, form, and here is emptiness, which you are trying to realize through your form. So 'form is emptiness, and emptiness is form' is still dualistic. But fortunately, our teaching goes to say, 'form is form and emptiness is emptiness.' Here there is no dualism."
When I was a kid, one of the conundrums that a friend used to ask in the playground was "what is the hardest thing you can do with your mind". (Yes we were kids - and yes he was very advanced for his age !!!)
Answer : To NOT think of elephants.
Now I am trying to decide if these two concepts are connected.