One line of Shakespeare's that sticks with me forever is the beginning of the soliloquy in which Hamlet's mother describes Ophelia's suicide:

There is a willow grows aslant a brook

I read a scholarly article years ago in which an argument was made about how Emily Dickinson had most certainly been inspired by the Shakespearean line to begin her own poem:

There is a certain slant of light

It's very interesting to me how such simple lines lead on to such great development--how such simple lines reel us in.

Anyway, I've just learned about a CD of viola music that has been entitled "There Is a Willow Grows Aslant a Brook"--wow! The simple line again reeling us in to an entire recording, and the line was haunting enough that Britten wrote a composition for viola that the notes on the link describe as being 'hauntingly beautiful.' I don't know the composition, but will definitely take a look at it soon.

http://www.asv.co.uk/dca1064.htm