The irrepressible plasticity of our brains

From Lehrer's Proust was a Neuroscientist:

"Neurogenesis is cellular evidence that we evolved to never stop evolving. George Eliot was right: to be alive is to be ceaselessly beginning. Since we each start every day with a slightly new brain, neurogenesis ensures that we are never done with our changes. In the constant turmoil of our cells - in the irrepressible plasticity of our brains - we find our freedom."