"For example, the Islamic prophet Muhammad taught his followers that even a smile is real charity: “Your smile for your brother is charity” (Fiqh-us-Sunnah, Vol. 3, No. 98). Important to both Christianity and Judaism, the Book of Proverbs teaches that “a friendly smile makes you happy, and goodnews makes you strong” (Proverbs 15:30)."
This is a good book in the sense that it is very well rounded and gives you a good picture of what a smile entails. However, there was very poor editing and also some typos. There were huge gaps in-between pages, and I really feel that the book can be halved in size and it would have no effect whatsoever on what one learns from it. However, it was still definitely beneficial. Something I found very interesting and unique was:
While traveling in the northern part of Asia, I discovered that in Japan and Korea and in some other Asian countries, people also smile more with their eyes than with their mouths. That is why Nancy’s host-mother in Japan may have covered her mouth; she,instead, was smiling with her eyes. In fact, research from Hokkaido University in Japan, as well as from Northwestern University in the United States and the University of Alberta in Canada, has shown that when someone smiles with the mouth only—and not with the eyes—the smile is not commonly recognized by the Japanese as a “real” smile. On the other hand, when people smile with their eyes but not with their mouths, Americans often don’t recognize these as a “real” smiles.
This explains the difference in smiley emoticons in America :-), which use neutral eyes and smiling mouth, and those in Japan ^_^, which use neutral mouth and smiling eyes.
This is a very interesting cultural observation.