Where is the cadenza in Shotstakovich's Cello Concerto No. 1

The first movement begins with its four-note main theme derived from the composer's DSCH motif, although the intervals, rhythm and shape of the motto are continually distorted and re-shaped throughout the movement. It's also related to a theme from the composer's score for the 1948 film: The Young Guard, which illustrates a group of Soviet soldiers being marched to their deaths at the hands of the Nazis. The theme reappears in Shostakovich's String Quartet No. 8 (1960).

the above mentioned statements talks about the creativity of an artist and to what extend they can utilize and experiment on the objects provided.   differing size and subjects are given so that an image of wisdom is created. displaying a transition from light to dark in something by darkening sections in order to create a shadow. and lastly, putting bits and pieces together to formulate a new image.