Abstract
From early infancy, structures are created in engaging with the world. Increasingly complex forms of self, other, and world emerge with shared rhythms, affective patterns and interpersonal routines, cultural norms, concepts and symbols, and so on. These open up an increasing number of possibilities for new kinds and levels of engagement and for further developing a world together. However, these same structures, becoming more rigid, salient, and perhaps reified with time, may obscure or obstruct engagement and constrain development. We explore this paradoxical relationship between structure and openness to engagement and attempt to understand the process of formation and change of structures in self and its relations to the world.