Working with James (we are going to get this piece published!) –
“According to Husserl, intersubjective experience plays a fundamental role in our constitution of both ourselves as objectively existing subjects, other experiencing subjects, and the objective spatio-temporal world. Transcendental phenomenology attempts to reconstruct the rational structures underlying – and making possible – these constitutive achievements.”
“Husserl’s notion of lifeworld is a difficult (and at the same time important) one. It can roughly be thought of in two different (but arguably compatible) ways: (1) in terms of belief and (2) in terms of something like socially, culturally or evolutionarily established (but nevertheless abstract) sense or meaning.
(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 F’llesdal 1988.)
(2a) If we consider a single community of subjects, their common lifeworld, or “homeworld”, can be looked upon, by first approximation, as the system of senses or meanings constituting their common language, or “form of life” (Wittgenstein), given that they conceive of the world and themselves in the categories provided by this language.
(2b) If we consider subjects belonging to different communities, we can look upon their common lifeworld as the general framework of senses or meanings that allows for the mutual translation of their respective languages (with their different associated “homeworlds”) into one another.”
Excerpts from http://plato.stanford.edu/entries/husserl/.