How we cite our quotes:
While I didn't feel that purposeful seas were wafting me to San Lorenzo, I did feel that love was doing the job. The Fata Morgana, the mirage of what it would be like to be loved by Mona Aamons Monzano, had become a tremendous force in my meaningless life. (40.8)
The novel spells it out here: John may have real feelings for Mona, but any reciprocal feelings would just be Fata Morgana, a.k.a. a grand illusion.
[The Mintons] were, I think, a flawless example of what Bokonon calls a dupes, which is a karass composed of only two persons. (41.3)
The Mintons certainly love each other. Later in the novel, Mr. Minton's speech about death and war shows how that love resonates beyond the couple and into their worldview. Moral? Maybe start by loving the ones you're with.
"The highest possible form of treason," said Minton, "is to say that Americans aren't loved wherever they go, whatever they do. Claire tried to make the point that American foreign policy should recognize hate rather than imagine love." (45.3)
While loving your nation isn't bad in and of itself, Claire suggests that this love can be taken to a point where it's no good for anyone.