She taught him how to sing 'harmony'. [=how to sing notes that combined with other notes in a pleasing way]
The governor's statement is totally 'out of harmony with' the mayor's earlier comments.
Our proposal has been revised to bring it 'into harmony with' their requirements.
(..) You are my treasure. Anthony and Mary, although I entrusted your education to your mother for your own best interest, I look forward to seeing you, and to a new period of harmony in our lives. Perhaps you might prevail upon your mother to come to this celebration, Hail Mary, full of grace... (..)1990 The Godfather Part III