 Even the objective spatio-temporal world, which represents a significant part of our everyday lifeworld, is constituted intersubjectively, says Husserl. (The same holds true for its spatio-temporal framework, consisting of objective time and space.) How so? Husserl starts (again, from a first-person viewpoint) from a “solipsistic” abstraction of the notion of a spatio-temporal object which differs from that notion in that it does not presuppose that any other subject can observe such an object from his (or her) own perspective. His question is what justifies us (i.e., each of us for him- or herself) in the assumption of an objective reality consisting of such objects, given only this “solipsistic” conception of a spatio-temporal thing (or event) as our starting point. On Husserl’s view, “the crucial further step” in order to answer this question consists in disclosing the dimension that opens up when the epistemic justification, or “motivation”, of intersubjective experience, or empathy, is additionally taken into account and made explicit (Husserliana, vol. VII, p. 435).