Why Give?

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Across
  1. 2. / State of being poor
  2. 4. / Famous Aretha Franklin song
  3. 5. / Effect's counterpart
  4. 7. / Group of people belonging to a particular segment of society
  5. 10. / To feel infused with strength
  6. 12. / A reduction of taxable income
  7. 16. / Thankfulness and appreciation
  8. 17. / Idea one has of oneself
  9. 18. / Believe in a supernatural power
Down
  1. 1. / Voluntary gift
  2. 3. / Sudden desire
  3. 6. / Lucky or well-to-do
  4. 8. / Beatles hit song
  5. 9. / Zero, to Serena Williams
  6. 11. / Acknowledgement
  7. 13. / Birthright, endowment
  8. 14. / Attendee of University of Tennessee
  9. 15. / Holy errand?