Dopamine induces attention and motivational salience , in other words , dopamine signals the perceived motivational prominance (

 I. e., the desirability or aversivevness ) of an outcome , which in turn propels the organism's behavior towards or away from achieving that outcome generating positive or negative cognitive effects. 
       ORIGIN OF MIND OF LIVING BEINGS 
      It's a matter of natural selection of millions of years in evolution and  It occurred mearly from a molecular of epinephrine or norepinephrine, unlike  GABA (- " a negatively charged  molecular " with no carbon rings ) , due to less number of carbon RINGS, Vs that of  serotonin (  2 carbon rings ),  according to my imagination ,  based on facts in my Research and Observations. 
    You know " Dopamine " , a neurotransmitter  when considering in molecular level,  as It lacks a 1 carboxyl group in comparison to the  molecule of norepinephrine, just as        dopamine is converted into norepinephrine ,  a carboxyl group is infused with it , resulting  in activation Of alpha 1 adrenergic receptors (modulating negative cognitive effects)  , for example,  aggressiveness.
     How about evolution of will power  ?
  Our key objective is to propagate Bhudhism through metaphysics and quantum physics , Chemistry and neuroscience. 

So It's vital to talk about evolution and meditation.

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