In order to give a full answer to the question what exists it is not enough to just state that the quantum field exists; it is necessary to answer the question of what that field is – that is, to try to present its full description.
At first glance, it might seem strange that the empty space/field in which there is neither energy nor matter nor material forms (which might better be termed nothing than something) can be described by no other words than just the term “nothing”. But it is not like that. The word “nothing” is just a description of what can be perceived by the senses about that field. This field, however, does not have only its outside observable (for the senses invisible i.e. non-material outside), but it also has its own subjective inside, known only to that field itself. So in order to give a complete answer to the question what exists, besides answering the question of what that field for the outside watcher is, we need to try to answer one of the most difficult philosophical questions which has so far been considered answerless: “What is this field as a thing in and of itself? That is, what is it for in itself?”
The conclusion that the field has to have a subjective inside, known only to that field, comes from scientific experience that states that quantum field particles’ movement (energy/matter particles’ movement) is self-movement that would not be possible if there were not the force which makes the field move from inside. It has to manifest itself as the ability of the field to exert and bestir itself by itself, and then to evolve too. So, that ability, as a non-divisible, noncreatable and non-destructible part of the field must have the meaning of existence and the meaning of the main and the first cause just as that field itself has.