Zoltan Kövecses
Language, Mind and Culture
A Practical Introduction
Oxford University Press 2006

pg 115: Metaphors - Mapping across frames
Metaphor plays a crucial role in the study of mind and culture. Let us begin how speakers of English talk about life - either their own or that of others. They say that some people have no direction in life, that they have to go through a lot,that they will go far in life, that some people have a head start , that some others carry heavier baggage,that they are at a crossroads, but they look back and think it was a bumpy road, but they are determined to reach their goals, and much else. Underlying all these different ways of talking about life is the unifying concept of a journey. Speakers of English commonly view the concept of life through the perspective of a journey.the concept of life is comprehended in terms of the concept of journey. The connection is systematic in the sense that we can observe systematic correspondences between the concept of journey and that of life.
Particular elements of the journey frame, or domain, correspond to particular elements of the life frame. We call such correspondences between tool frames conceptual metaphor. Metaphor is a set of cross-domain mappings. It is customary to represent such relationships between two frames with the notation of A is B, which would be "life is a journey". The concept to be comprehendedis given first (A), while the concepts used for its comprehension is given second (B). The "is" between the two is used to indicate this relationship between the concepts.

pg. 116: Components of Conceptual Metaphors
Source domain
Target domain
Basis of metaphor
Neural structures that correspond to source domain and target domain
Relationships between source and target
Metaphorical linguistic expressions
Nonlinguistic realisations
Cultural models

Kövecses 130:
In the cognitive linguistic view, metaphors are cross-domain mappings. Metaphor is a phenomenon on that is linguistic, conceptual, social cultural, neural, and bodily at the same time. It involves two domains of experience that are systematically connected. The two domains come from distant parts of the conceptual system (and the brain). The connections between the two set up either because the two domains display some generic structural similarity or because they are correlated in our experience.