Resonance, which may have been established on the basis of similarities between two people, may develop into a relationship of complementarity, such as the one that exists between teacher and student; in such cases feelings of superiority and inferiority may arise to compromise the notion of equality.
Image, tout d'abord, de l'élan de solidarité qui peut pousser certaines personnes, certains groupes ou certains peuples, à s'entraider à l'occasion de catastrophes naturelles - inondation, tremblement de terre, raz-de-marée, sécheresse, famine ou incendie. Une autre image est celle de la collaboration entre les