tree of yoga

The sap of the tree, the juice which carries the energy on this inward journey, is dhāranā. Dharāna is concentration—focusing the attention on the core of being. 
The tree’s fluid or sap links the very tip of the leaf to the tip of the root. This experience of the unity of the being from the periphery to the core, where the observer and the observed are one, is attained in meditation. When the tree is healthy and the supply of energy is wonderful, then the flowers blossom out of it. Thus dhyāna, meditation, is the flower of the tree of yoga.
— Yogācārya B. K. S. Iyengar, Tree of Yoga, 1988, p. 9.
 The unconditioned mind-in-the-moment eats, transforms, goes beyond, language. Art, or creative play, sometimes does this by going directly to the freshness and uniqueness of the moment, and to direct unmediated experience.
— Gary Snyder

Adho Mukha Vrksāsana - downward facing tree