Both Federn and Aichhorn successfully used their personalities to treat psychotic or delinquent patients. Both combined great strength with kindness and courage. Federn could detect quickly the nature of the ego impairment and furnish support, helping the patient increase his psychic energy or reduce his demands. Combining objectivity with great empathy, he could in an underlying psychosis continue analysis of the ego disturbance while aiding the patient to gain repression. Aichhorn dealt directly with the patient's disorganization, rather than with deficiency of libido cathexes, as did Federn. Both gave up the first stage of analysis, but used the psychoanalytic concept of transference and accepted the libido theory.