What is the Verse?

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Across
  1. 3. plan
  2. 4. slant
  3. 6. never
  4. 7. must
  5. 9. master
  6. 10. straight
  7. 13. until
  8. 14. trail
  9. 15. core
  10. 17. thee
Down
  1. 1. keep
  2. 2. entire
  3. 5. admit
  4. 8. knowledge
  5. 11. inside
  6. 12. faith
  7. 15. sir
  8. 16. your
  9. 18. male