In the natural attitude, the world, as being the same throughout the alteration of actual and possible, subjective and intersubjectively interrelated appearances, opinions, interests, is generally speaking not a scientific subject matter; rather, the human being's subject matter, in a broader sense, is everything that momentarily affects him or that concerns him enduringly, possibly becoming a fixed habituality (as in a vocation): in seriousness or in play, in effecting or creating things of value or things without value, temporary or lasting things, accomplishing things in egoistic or in the communal interest, as an individual or as a functionary of the community in communal work; his own and the generative memory leads him to the communal life of the past.