Harmony is beautiful. Harmony makes music. Harmony requires differences.
Harmony sometimes comes in the form of tensions. Life sometimes comes in the form of tensions.
Living wholly inside tensions doesn’t make a beautiful life, and living wholly without tensions doesn’t make a beautiful life.
Beautiful music is made from creating tension and then resolving it. A beautiful life can come from creating tensions and then resolving them.
The beauty requires both the tensions and the resolutions.