Brain is the most complex, puzzling and attractive object in the universe. Everybody knows that brain is responsible for control of our learning, memory, motivations, consciousness, etc. Moreover, a brain by a certain mysterious way produces the Subject (or Self, Person, Ego, Observer - whatever you like), which tries to look into brain and understand the Subject itself. The means for the objective observation of a subjective world are absent, but we can observe the consequences of objective existence. Neurobiology is the only science that considers the subtle facet between substance and mind.