Shall I compare thee to a Summer's day was composed for a mixed choir, with lyrics from the famous sonnet by William Shakespeare by the same name: The timelessness of Shakespeare's verses is still proof of the quality and richness of his oeuvre.
Therefore, old and new go hand in hand when put to music. Shall I compare thee to a Summer's day is written in the Phrygian mode, but the sounds have been coloured and enriched in a contemporary way (in the form of sound clouds). Polyphonic and homophonic orchestrations alternate with aleatoric elements.
All these aspects serve the expressive weight of the lyrics, thereby not refraining from the use of lyrical expressions (rough winds, the eye of heaven shines, gold complexion dimmed, grow'st etc.).