Composer Michael Story writes for all levels of musicians and is best known for his many compositions for young bands and marching bands.  Says the composer of his piece Chrysalis:

Although generally defined as any sheltered or growth stage of development, a chrysalis in its fundamental meaning is the third stage of growth in the development of a butterfly. Following the egg and larva (caterpillar) stages, the chrysalis stage is a dormant, quiet period where the adult features of the butterfly are developed. After this growth stage, the adult emerges from the pupa (chrysalis) and takes to the sky as a fully developed butterfly.

Try to imagine this sequence of events as you listen to Chrysalis here.  Enjoy!