Baha'u'llah & the New Era 1970 by -J. Esslemont- 1 Para

The prayers which were written for the purpose of healing are both for the spiritual and material healing.. If healing is best for the patient, surely it will be granted. For some who are sick, healing for them shall be the cause of other ills. Thus it is that Wisdom does not decree the answer to some prayers (73:8)

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