definition of culture.

i just started a book for my gender & culture class called, culture-centered counseling and interviewing skills (by paul b. pedersen and allen ivey). they begin their book with a very interesting definition of culture:

"culture is not something outside ourselves, but, rather, an internalized perspective that combines the teachings of every significant person or group we have experienced, read about, or heard about and from whom we have learned something. when individuals try to understand their own or someone else's culture, it is understandable that they are frequently overwhelmed by the complexity of the task. each of of us then 'belongs to' a thousand or more cultures, any one of which might become salient or most relevant depending on the time, the place, and the situation."