The Intellectual Enlightenment

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Across
  1. 3. The universe seen as a well-ordered whole
  2. 6. The smallest unit of energy or light
  3. 8. Sudden inner enlightenment in Zen tradition
Down
  1. 1. A particle representing a quantum of light
  2. 2. The mental state of being fully immersed in a task
  3. 4. A cell that transmits "enlightened" impulses
  4. 5. A fundamental change in approach or underlying assumptions
  5. 7. The classic cry of a sudden discovery