Heidegger's theme from beginning to end was "Being". Why is there something rather than nothing, and what is existence anyway? In practice, it was the second question that dominated his life. He started out in phenomenology, so he was initially interested in being as appearance. We get this idea of existence from somewhere, but where exactly? How does it emerge from appearance? Another theme was the forgetting of Being in favor of beings. The modern mind, with its busyness and technological power, is usually engaged in interaction with one partic... (read more)