Among other things, neuroplasticity means that emotions such as happiness and compassion can be cultivated in much the same way that a person can learn through repetition to play golf and basketball or master a musical instrument, and that such practice changes the activity and physical aspects of specific brain areas.

Weil's general view is that mainstream and alternative medicine are complementary approaches that should be utilized in conjunction with one another (what he terms integrative medicine). He has written many books and a total of 10 million copies have been sold. There also can be no doubt that a few of the "natural" medicines and healing methods now being used by practitioners of alternative medicine will prove after testing to be safe and effective.

Weil appeared on the cover of Time Magazine in 1997 and again in 2005. He has written many books and a total of 10 million copies have been sold. He received both his medical degree and his undergraduate degree in biology from Harvard University and establiAndrew Weild the field of integrative medicine which aims to combine alternative and conventional medicine.