 (1) If we restrict ourselves to a single subject of experience, the lifeworld can be looked upon as the rational structure underlying his (or her) “natural attitude”. That is to say: a given subject’s lifeworld consists of the beliefs against which his everyday attitude towards himself, the objective world and others receive their ultimate justification. (However, in principle not even beliefs forming part of a subject’s lifeworld are immune to revision. Hence, Husserl must not be regarded as an epistemological foundationalist; see Føllesdal 1988.)