This is an authoritative and compelling introduction to Martin Heidegger's body of work. I especially valued this book for its discussion of the logic of silence, Sigetik, in virtue of which Heidegger proposes we explore Being at greater depth than the merely conventional logic of discourse. Poetry can tap into this rich eloquence beyond normal speech, and "name what is holy." Instead of a chain of explanations, operating on a superficial level, by embrace the Ab-Grund of Being, i.e. the abyss.