STRONG

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Across
  1. 2. Strength source
  2. 4. Strength in joy
  3. 6. Resist challenge
  4. 8. Fearless nature
Down
  1. 1. Improve steadily
  2. 3. Keep going
  3. 4. Stay firm
  4. 5. Raise high
  5. 7. Never quit
  6. 8. Face fear