As a newborn we don't know that existed a world before us, we don't know that the things and people we see, hear and interact were there before us, we don't even know the concept of "before". When a newborn cries as a reaction of the uncomfortable or painful feeling of hunger their mother offers the milk from her breast, while for the newborn it is as if they have created the milk out of his cries, it is as if they have create the breast, as if it is appearing from nowhere; for the newborn even their mother is his own creation, as everything that there is out there and come in contact with them. Donald Winnicott explains it's natural for newborns to feel like everything comes from them. It's not a thinking, not a conceptualization in their heads (since they have none) but only a sensation.
If we feel people and things comes from us then it is as if they are us, it is specially true in relation with newborns and mothers who they experience the more frequency and intense touch, glance and care; who the newborn recognize the voice, the movements and the heartbeat when in their her womb.
The process of growing up is a phase of frustration because it is when we face the harsh reality that we can't have things as would please us and whenever we want all the time. It is when we start to realize that our mothers are an independent person with her own individuality, that things don't disappear when we don't see, feel and hear them anymore but they just go somewhere else, in an other place and reality that exist independent from us and was there before us came to the world.
Winnicott explains it is important for the child to express their frustration; The frustration expression happens in many ways, from associating people and things with good or bad personalities they learn from stories, by expressing and illustrating such associations in drawings, through playing which Winnicott described as a serious thing for the child, because it is through playing children try to make sense of the world and express their feelings; by expressing the act of love or hate and even destruction when the frustration feels unbearable, such as kicking doors and throwing things on the floor in anger. When toddlers are repressed, forbidden or punished, for being aggressive or destructive, they express their frustration in dreams, often as a nightmare.
All expression, of any kind, is an act of creation and destruction of our wishes and frustration even for grown ups. The act of building things, shape things, drowning and interacting are acts of creation that often help us to deal and overcome things in life that we can not have as we wished. In building and shaping things, or painting and drawing, in an aggressive manner or in an odd, freak, antic form can be an expression of destruction. At the end, what differ adults from toddlers other then becoming civilized, which means learning to repress and express our feelings of love (creation) and frustration (destruction) in a civilized way?
Depending on how we were allowed to overcome our unbearable frustrations is how we learn to deal with it in adult life. Not being able to overcome our natural frustration while growing up creates damaged adults who becomes little dictators, manipulative, aggressive, expressing their emotional pain with mean comments about people, through aggressive identitarian expression (such as football team support, nationalism or so) or through political and ideological position as representation of good and evil to be fought and imposed as they wish. The wanting of creating the world the way they want and the frustration of not being able to, which turns people nihilist.
Art helps us to deal with our feelings, it helps us to become civilized, it is the playing and the symbolic association we do to things, just like toddlers do which deep inside it is always serious for helping us to make sense of this world. Every act and interaction is an expression; From the little help we offer to a stranger, in mean comments some people do about others' appearances, in art, especially in confusing art, all is a form of expression.
Maybe because of its expressiveness representation people normally expect art to have a message, so they try to interpret what pieces of art say or what they are about, turning art into a utilitarian object that needs to have an explanation in order to be accepted and recognize as art. But as Susan Sontag says in "Against Interpretation", art is not about something, art is not supposed to have an utilitarian use for the public who appreciate and collect it, art is not about something. Art is a thing of its own, its only use is to experience it, sense it, as we are supposed to sense the world around us, shapes, sounds, colours, texture, composition pasterns and so. The same was a child kinking the door because of frustration is not a message but a sole expression of frustration, a something to be experienced in order to overcome the frustration, a hope that out of the destruction a greater figure will establish order. Reason why adults should not ask toddlers why they are misbehaving, they don't know and according to psychoanalysts such question only creates more confusion and frustration in their heads, which causes them to overthinking, leading them to mental stress and depression.
We can create and recreate meanings according to our own individual or collective understanding and experiences. Meanings are important, they are the associative representation we use to make sense of the world, consequently we use such meanings in our conceptual expression. But meaning and truth are not the same thing, so art is not about the message it carries (the meaning we give to it) but about the experiencing of its expressiveness, as creation and destruction, as overcoming our deep painful and unbearable feeling that causes us to overthink, so we can quite our mind and experience the fulfilling calm stillness behind everything, after the fulfilling act.