The present work aims to investigate the basis of an individual s capacity to be alone and to apprehend what would compromise the possibility of someone being, existing and constituting a unit, achieving emotional growth and autonomy. For this, a theoretical research was developed from the analytical conceptual method. The investigation was based mainly on the theory of the English psychoanalyst Donald Winnicott. In a first part, it was investigated the positive aspect of aloneness based on the Winnicottian conception of being alone as a capacity. In the second part, it was related the capacity to be alone with the Winnicottian potential space, starting from the reinterpretation and understanding of Thomas Ogden that in the capacity to be alone, the child becomes capable of generating a continent space in which he lives. Finally, in the third part of this research, it was contemplated the desert aspect of loneliness, seeking to understand possible difficulties in primitive emotional development that would make the experience of being alone unfeasible. It was investigated the primitive anxieties and the defensive processes involved in the beginnings of development, exploring the etiology of the Winnicottian false self in counterpoint to the baby s spontaneous gesture.