[Guille]

If we see (metaphysically speaking) the body as positive mass and the mind as negative mass, then we can say that the 'communication' between the two is the compensation to make the values equal, so our total existence of what we have is zero. If we burn our hand, our mind will hurt, therefore the mass that is added to the things that happen to the body (that it burns) is equilibrated by the mass that is added to the things that happen in the mind (that it hurts). It also works inverse (from mind to body). Now, as the total number of what we have, of what we occupy, is zero, in order to really exist to the external 'other' we must have communication with it. And this is what we do. This is art, in language, in sound, in image. This is expression (art) and impression (philosophy). Observation (science) has no place here, that is, it is not about the entity and the other, it is about the entity's 'other' and the 'other's' entity. So, in contrary to what capitalism (liberalism), traditionalism (conservatism) and state-people theories (socialism) tell us, having is not being, for being is doing. And this is an honest principle which we should follow and learn from the theory of some theologies. I'm an atheist, but not stupid to know the value of that principle.