Why man cannot heal himself

When the doctors present had no more questions for discussion, 'Abdu'l-Baha said that He had one question to ask them.

"Why is it that the animals heal themselves, but man in sickness remains puzzled or helpless?"

For a moment the doctors looked at each other inquiringly, but not one opened his lips. Finally, after consultation, perhaps, they said, "We would rather hear the answer from the lips of His Holiness 'Abdu'l-Baha." This was His answer: "Because man's thoughts are not limited to one direction; therefore, he is more heedless. On the other hand, however, through concentration and deep thinking, his knowledge is more than all other creatures." 

(Notes of ‘Abdu’l-Baha's comments, May 7, 1912, Pittsburgh, PA, recorded by Dr. Zia Baghdadi; Star of the West [The Baha’i Magazine], vol. 19, no. 5, August 1928)

How doctors should approach healing

If they (the doctors) learn about the foci-that is, the points of entrance of disease germs-and take the balance or equilibrium of the body elements as the base of treatment, and when an element is diminished or lacking, a diet that can supply the diminished element is given, then there will be no need for drugs and other difficult methods of treatment. 

- 'Abdu'l-Baha  (Words of ‘Abdu’l-Baha, May 7, 1912, Pittsburgh, PA, recorded by Dr. Zia Baghdadi; Star of the West [The Baha’i Magazine], vol. 19, no. 5, August 1928)

East & West need each other

The Orient must acquire material civilization from the Occident and the Occident must acquire divine civilization from the Orient. 

- 'Abdu'l-Baha  (Words of ‘Abdu’l-Baha, May 7, 1912, Pittsburgh, PA, recorded by Dr. Zia Baghdadi; Star of the West [The Baha’i Magazine], vol. 19, no. 5, August 1928)