How does knowledge open doors?

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Across
  1. 1. Alphabet.
  2. 4. Book's backbone.
  3. 7. Book maker and marketeer.
  4. 11. Knowledge.
  5. 12. Atmosphere.
  6. 13. Prince of Bismarck.
  7. 14. Sleeping beauty syndrome.
  8. 16. The best well-known university in the world.
  9. 18. British political party.
  10. 21. Wooden duck, say.
  11. 23. Dry up as in liquid.
  12. 25. Studies.
  13. 26. Strange and scary.
  14. 27. Lost at ___.
  15. 29. Transfers files to a computer.
  16. 31. Top score?
  17. 32. Supersmart group.
  18. 33. Vista.
Down
  1. 2. Family.
  2. 3. WWII era German Industrialist with a list.
  3. 5. Richest city in the world.
  4. 6. Old Japanese assassin.
  5. 8. Winter neckwear.
  6. 9. Concept to self.
  7. 10. Pie à la mode.
  8. 15. Innovation.
  9. 17. Sony laptop brand.
  10. 19. Van Gogh's brother.
  11. 20. Literary piece.
  12. 22. Selling places.
  13. 24. Harvard rival.
  14. 28. ___diem.
  15. 30. Money in Mexico.
  16. 32. Send out.