" Sometimes we find ourselves in the presence of a form that guides and encloses our earliest dreams. For a painter a tree is composed in its roundness. But a poet continues that dream from higher up. He knows that when a thing becomes isolated, it becomes round, assumes a figure of being that is concentrated upon itself. In Rilke's Poèmes francais, this is how the walnut tree lives and commands attention. Here, again around a lone tree, which is the centre of a world, the dome of the sky becomes round, in accordance with the rule of cosmic poetry."
Gaston Bachelard - the Phenomenology of Roundness -
the Poetics of Space ( 1958)