The way you make users understand your program model is with metaphors.

Even the individual flowers are loaded with metaphor and meaning.

The novel is filled with such metaphors for its own secret operation.

My word, I do have a way with metaphors.

Because of its close connection with metaphor, simile may also be considered here.

Similes may be confused with metaphors, which do the same kind of thing.

The poem is very rich with metaphors that relate to religion, politics and history.

Or it could just be a personal childhood memory fraught with psychological metaphor.

With metaphors like that, the film doesn't need enemies.

Or a-her mind filled with metaphors and she smiled, slightly, to herself.