Binswanger saw Husserl's concept of lifeworld as a key to understanding the subjective experiences of his patients, considering that "in the mental diseases we face modifications of the fundamental structure and of the structural links of being-in-the-world". For Binswanger, mental illness involved the remaking of a world - including alterations in the lived experience of time, space, body sense and social relationships. Where for example the psychoanalyst might only see "an overly strong 'pre-oedipal' tie to the mother", Binswanger would point out that "such overly strong filial tie is only possible on the premise of a world-design exclusively based on connectedness, cohesiveness, continuity".