The tree has an origin invisible to us in its underground roots. As our ideas are invisible inside the skull.

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There is a visual resonance in the fractal structure of a tree, similar to our neurons. Trees help us think and reflect, as we know they deeply inspired Newton, Buddha, Whitman or Gaudí. Trees give us the material with which we manufacture our paper books, where we communicate ideas.

We all may find a physical and spiritual calm while walking through a wood or in remote forests, which brings us a sense of existence.