Steve Beyer on Levinas:
"It is clear that Heidegger’s ideal is in fact a sort of spiritual solipsism. All the Heideggerian virtues — authenticity, resolution, heeding the call of conscience — serve to isolate (vereinzeln) us. Thus, for example, “Death, understood in authentic anticipation, isolates Dasein in itself” (1962, § 53, p. 308); “Understanding the call of conscience reveals one’s own Dasein in the dreadfulness of its isolation” (§ 60, p. 342); “The call of conscience… implacably isolates Dasein” (§ 62, p. 354)
Heidegger’s philosophy is thus an egology: the relation with Being is more important than the relation with other people. But where Heidegger finds significance in existence as a project, Levinas locates it precisely in responsibility for the Other. “This is the question of the meaning of being: not the ontology of the understanding of that extraordinary verb, but the ethics of its justice. The question par excellence or the question of philosophy. Not ‘Why being rather than nothing?’, but how being justifies itself” (Levinas, 1984, p. 86)." (from blog post here)
"... in a deep sense one's life is not about oneself." The New Religious Intolerance, xiii.