Seurat's optical mixture created greater

Depends on which book your talking about or movie.

Iwould say asking questions. even over the small things because then you can get an answer that should you to understand more.

Artists usually use musical imagery to make their compositions more unique and alive. imagery in music used to "show" music. because of that listeners feel what happens. they see music like complete composition. they hear sounds, they feel movement, they see a picture. it makes music deep. that's why  musical imagery is very important and is used by artists so frequently.