Watchtowers quote: "They set their minds on—are most deeply interested in, constantly talk about, engage and glory in—the things pertaining to the flesh."
Full sentence: "They set their minds on—are most deeply interested in, constantly talk about, engage and glory in—the things pertaining to the flesh, that is, to sinful human nature."
They left out "sinful human nature" That is the flesh. What is so sinful about travel and hobbies?