Some Ans. Questions 1908 by -'Abdu'l-Bahá- 1 Para

But the mind is the power of the human spirit. Spirit is the lamp; mind is the light which shines from the lamp. Spirit is the tree, and the mind is the fruit. Mind is the perfection of the spirit and is its essential quality, as the sun's rays are the essential necessity of the sun (209:1)

End of Quote

  Some Ans. Questions 1908
  Citation Source List
: see