Such conclusion did Berkeley, who considered possible existence of only the incorporeal, the spiritual.

However the incorporeal is non-being, which must stay in it owing to impossibility of emergence in this "Nothingness" of internal contradictions with their exit "outwards" – in beingness. We observe quite real picture of the world, and the things, which are in it, aren't incorporeal, on the one hand, at this, consciousness, on the other hand, interacting, in particular, with a body, despite own elusiveness, is quite effective and material force which is reflected in the psyche and transformation of sensations into constantly shifting picture of the world.

Husserl, investigating consciousness in its ratio with beingness, despite different fluctuations, ultimately, like Berkeley, acknowledged the possibility of existence of only consciousness even if the whole world will disappear: “Consequently, no real being, no being which is presented and legitimated in consciousness by appearances is necessary to the being of consciousness itself (in the broadest sense, the stream of mental processes)” [10, p. 110].

Avenarius and Mach prove that without consciousness there is no matter, and without matter there is no consciousness so how in experiment distinction between subject and object disappears. On this basis they deny existence out of the person of objective reality.

V. I. Lenin, as a materialist, has put forward against this approach the following objections.

“For every scientist who has not been led astray by professorial philosophy, as well as for every materialist, sensation is indeed the direct connection between consciousness and the external world; it is the transformation of the energy of external excitation into a state of consciousness. This transformation has been, and is, observed by each of us a million times on every hand. The sophism of idealist philosophy consist in the fact that is regards sensation as being not the connection between consciousness and the external world, but a fence, a wall, separated consciousness from the external world – not an image of the external phenomenon corresponding to the sensation, but as the “sole entity.” Avenarius gave but a slightly changed form to this old sophism, which had been already worn threadbare by Bishop Berkley. Since we do not yet know all the conditions of the connection we are constantly observing between sensation and matter organized in a definite way, let us therefore acknowledge the existence of sensation alone – that is the sophism of Avenarius reduces itself to” [1, chapter 1.1]; “The existence of matter does not depend on sensation. Matter is primary. Sensation, thought, consciousness are the supreme product of matter organized in a particular way” [1, chapter 1.2].

In response to this statement of Lenin V. I., we will notice the following.

The person, the lizard, the spider perceive in their own way the same thing and use it accordingly. In some cases, the thing, which is perceived by the person, is unavailable to the worm, not passing through the channels of his sensations, or this thing is felt by the worm completely in a different form and properties. That is, the worm has some own environment, own world anyway and the person isn't able to get into it, and vice versa. In other words, sense organs of various beings form their own environment not from "ready" things, but form it in compliance only with those means which they possess. Therefore the "form" of the thing, which emerges in consciousness of any living being, depends on its sense organs, but not from matter "on the other side" from sensations.