"Because of all the ways your brain changes its structure, your experience matters beyond its momentary, subjective impact. It makes enduring changes in the physical tissues of your brain which affect your well-being, functioning, and relationships. Based on science, this is a fundamental reason for being kind to yourself, cultivating wholesome experiences, and taking them in."
Rick Hanson in Buddha's Brain: The Practical Neuroscience of Happiness, Love, and Wisdom pp. 72-73