" I shall never find a better document for a phenomenology of a being which is at once established in its roundness and developing in it. Rilke's tree propagates in green spheres a roundness that is a victory over accidents of form and the capricious events of mobility. Here becoming has countless forms, countless leaves, but being is subject to no dispersion: If I could ever succeed in grouping together all the images of being, all the multiple, changing images that, in spite of everything, illustrate permanence of being, Rilke's tree would open an important chapter in my album of concrete metaphysics. "

― Gaston Bachelard , The Poetics of Space