Objective existence vs. Subjective existence
Or: why a mere subjective form of existence, can not be
all there is without there being an objective material world.
" (...) Hunger is a natural need; it therefore needs a nature outside itself, an object outside itself, in order to satisfy itself, to be stilled. Hunger is an acknowledged need of my body for an object existing outside it, indispensable to its integration and to the expression of its essential being. The sun is the object of the plant — an indispensable object to it, confirming its life — just as the plant is an object of the sun, being an expression of the life-awakening power of the sun, of the sun’s objective essential power.
A being which does not have its nature outside itself is not a natural being, and plays no part in the system of nature. A being which has no object outside itself is not an objective being. A being which is not itself an object for some third being has no being for its object; i.e., it is not objectively related. Its being is not objective.
A non-objective being is a non-being.
Suppose a being which is neither an object itself, nor has an object. Such a being, in the first place, would be the unique being: there would exist no being outside it — it would exist solitary and alone. For as soon as there are objects outside me, as soon as I am not alone, I am another — another reality than the object outside me. For this third object I am thus a different reality than itself; that is, I am its object. Thus, to suppose a being which is not the object of another being is to presuppose that no objective being exists. As soon as I have an object, this object has me for an object. But a non-objective being is an unreal, non-sensuous thing — a product of mere thought (i.e., of mere imagination) — an abstraction. To be sensuous, that is, to be really existing, means to be an object of sense, to be a sensuous object, to have sensuous objects outside oneself — objects of one’s sensuousness. To be sensuous is to suffer.
Man as an objective, sensuous being is therefore a suffering being — and because he feels that he suffers, a passionate being. Passion is the essential power of man energetically bent on its object. (...)"
Excerpt from:
http://www.marxists.org/archive/marx/works/1844/manuscripts/hegel.htm"