It’s clear that Silverstein, who grew up in Chicago in the 1930s, did not set out to write things for kids. In fact, he hated most children’s literature. To Silverstein, the classics and contemporary books alike were trash, though he had a soft spot for Dr. Suess. But as for old stand-bys like Charlotte’s Web, Stuart Little — “Those damn books are so bad they’re beautiful,” he once said, according to A Boy Named Shel, a 2011 biography by Lisa Rogak. “The condescension is not only thick enough to walk on, but absolutely destructive.” So when a friend suggested he start penning picture books, he thought it was far-fetched; Silverstein was known mainly for drawing offbeat cartoons for Playboy magazine, and was a regular visitor of the Playboy Mansion.
It's surprising that Silverstein originally hated childrens books,. The author uses a quote from Silverstein - "The condescension is not only thick enough to walk on, but absolutely destructive”. This quote shows that the giving tree being as cryptic as it is, is a result of his distain for the obvious nature of most children's books. The author's inclusion of this quote helps to characterize Silverstein.