Metaphor as transport of meaning

From Open Letters Monthly: "Perhaps the simplest way to think about metaphor is as the connection formed when meaning is transferred from one thing to another. This is not the only way to construe metaphor, of course; early English literary critic George Puttenham, in his 1589 'Arte of English Poesie,' argues that metaphor is 'the figure of transport,' whereby an abstract or difficult idea is transposed by a more readily grasped idea, so that 'every man can easilie conceive the meaning' originally intended by an author."