The brain and spinal cord br contain a hundred billion neuron cells br backed up by many more glial cells.. br br each neuron surrounded by its dendrons br like a tree’s inquisitive, hungry roots br or a seacreature’s gently waving fronds br br making synapses, new connections br between what one cell holds, and another, br as a tree’s roots seek its heavenly nourishment in earth; br br so that, each time two words of poetry, br put together for the first time by a poet br in just that way, strike your mind or heart, br br one of those neurons cries silently ‘Aha! ’ br as poetry’s roots and fingers touch its core; br two neurons now joined in holy bedrock..