"This physical world of man is subject to the power of the lusts, and sin is the consequence of this power of the lusts... The body of man is a captive of nature; it will act in accordance with whatever nature orders... A man who has not had a spiritual education is a brute." Some Ans Questions 1908 Page 135 . (49:7)

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The Worlds of God
U.S.Baha'i National Ref Library Committee