Three stages of a healthy relationship:
Purposes are communicated. Investment is heavy and constant. Definitions have not yet been made or are still loose. Illusions and assumptions are numerous.
Purposes are agreed upon. Investment is heavy but sporadic. Illusions are lost. Definitions are forming; narrowing the scope of hope, sharpening the purpose.
The relationship is defined and has achieved a rhythm, frequency and amplitude appropriate to the purposes of the relationship.