Reach for the top

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Across
  1. 3. a state of happiness and satisfaction.
  2. 6. based on or in accordance with reason or logic.
Down
  1. 1. wealthy
  2. 2. the ability to endure an unpleasant or difficult process or situation without giving way.
  3. 4. in a nervous or timid manner.
  4. 5. existing at a particular time.