In a way, that's the third force. It is the plan, the vision and the binding force. Where does love come from? How is it created and generated?
The spirit of the relationship is this common mind set. It is the force in society which sponsors your couple. It is ancient and new at the same time. It was there from the beginning of humankind. You can call it a tradition, a stream of inspiration, the inner vision.
When you meet someone you like, there is a triangle of energies building up.
These three polarities are you, your partner and the spirit of the relationship.
For the relationship to work out, you need these three forces to come together.
This is what creates magic. This is what opens doors: a common vision, a common goal, synergy!