Whose Quote Is It?

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Across
  1. 6. Everyone starts off with an "A" it is up to
  2. 8. Practice makes habits.
  3. 10. I believe in you.
  4. 11. Am I talking too fast, or are you listening
  5. 13. Learn something new today.
  6. 14. Failure is not an option, it's a choice.
  7. 15. When you think I'm not looking, I'm looking.
Down
  1. 1. No pressure, no diamond.
  2. 2. Have a great day!
  3. 3. Make today a great day or not, the choice is
  4. 4. Don't do that, that's wrong.
  5. 5. slow.
  6. 7. to keep it.
  7. 9. Work first, play later.
  8. 12. Work smarter not harder.