Martin Heidegger is the important philosopher of 20th century because he developed existential phenomenology. He followed the Husserl's idea of return to the things to themselves, which called phenomenology. Martin Heidegger's first essential work of is being-historical thinking. He discussed two important issues in contemporary continental thought and theology. Heidegger thought that two historical beginnings in which theme of both beginnings are essential to understand the succession. He believed the main source is being itself.
The main idea is entanglement of God and being. He helps to comprehend of humanity, being, and God. Heidegger turned to poetry because he believed poetic thinking can cover unseen, and unspoken. He composed the Beitrage zur Philosophie-translated as Contributions to Philosophy after Being and Time. The Beitrage zur Philosophie is far from analytical display of philosophy and about poetry expression. The book has six sections and final section contrast to the metaphysical. Those six sections are: echo, playing-forth, leap, grounding, the ones to come, and the last God. Those six sections linked with theme of enowning, or appropriation of event. "The appropriation or enowning of being is event or its self revelation and self concealment." He determine that Being itself enowned and historical. Heidegger mentions about two historical beginnings: first one is Greek philosophy and second one is Nietzsche' visionary work. Two beginnings help to apprehend the development of six sections.