"This is mainly because I spend a lot of time writing and so don't have much time to read; I hate to waste that time reading what may turn out to be junk food for the mind, when there's so much real writing to be read"

In this quote, John Sladek is revealing his preference for editing reading. He describes that he spends a substantial quantity of time writing, which leaves him with minimal time for reading. He then goes on to say that he dislikes wasting his valuable time on reading material that might not be intellectually stimulating or valuable. Rather, he thinks that there is an abundance of quality composing readily available that deserves his time and attention. This quote highlights Sladek's dedication to his craft and his belief in the importance of consuming significant and thought-provoking literature.