Harmony in Music and Relationships
In music, two or more notes harmonize when the wave lengths of their respective vibrations are compatible and produce a pleasing sound. You do not have to be a musician or mathematician to know when they are discordant–they are not compatible, and they are not in harmony. They don’t sound good together. There’s nothing wrong with either note, of course. They are equally good and legitimate notes. They just don’t sound pleasing to the ear when played together. You could say they are “fighting” each other.
So too in a relationship. Two people who are not on compatible “wave lengths” could be said to be discordant, or fighting each other in some way. Add a third person who is not on the same “wave length” either, and you’ve got a real mess.
Discord in the Parent-Child Relationship