In psychoanalysis, the function of construction consists in mapping the unheard of the unconscious logic. In this way, speaking (la parole), or the subjective position and thus the desire of the patient, acquire room to move. It is from the dialectic between the unconscious and the conscious discourses that the absurd can be elaborated. This castration happens through a construction which, in turn, provokes the creativity of the subject. This mechanism is illustrated with a clinical case.