When things look bleak, there is a way through if you turn into the heart of the matter. Sit at the hearth of it and it changes. Look away and things simmer.
Harmony is a musical term:
The combination of simultaneously sounded musical notes to produce chords and chord progressions having a pleasing effect.
There is a different sound when things come together in a new way. Harmonizing is not quite harmony, but it means catching the drift of that pleasing combo.