Mind is the brain?

[little_monkey]

My point is:

(1) observable (smiling, breathing... etc)  → mindful

(2) observable (smiling, breathing... etc)  → brain activities

Therefore I have to conclude that,

(3) mindful = brain activities

That correlation does not depend on someone defining "qualia". My point is that the mind IS brain activities. I'm taken that you are saying that there is more to mind than just brain activities, or am I mistaken about your position?

I still don't really understand your point (1).  Are you defining mindfulness as something that smiles or breathes, or saying that if something smiles or breathes, it must be mindful?

Because these are activities of the mind. You smile, you think about smiling, you breath, you think about breathing. All the activities that you do passes by your brain, even when you're not conscious of it. And that's why in (2), you also see points in your brain registering when you do these mindful activities. Through MRI, we can detect exactly where in your brain these activities are associated with. 

If you believe that MIND = BRAIN ACTIVITIES + something else, then it's upon you to show that you can perform a mindful activity without any activity in the brain. Otherwise, you are grasping at straws.