71a5bc5nhcl_sl500_aa240_Well known psychologist David Schnarch has a wonderful book called the Passionate Marriage: Keeping Love and Intimacy Alive in Committed Relationships.

When Schnarch speaks about boundaries he speaks about differentiation.

What is differentiation? In short, according to Schnarch:

Differentiation is a natural process in committed relationships that involves developing more of a self while growing closer to your partner. Men often sacrifice their relationship to hold onto their sense of self. Women often sacrifice their sense of self to stabilize their relationship. Differentiation is about having it both ways: having a stronger sense of self and a stronger relationship. (An Interview with Dr. David Schnarch)


Schnarch will often say that differentiation is knowing where one begins, and one ends. Or the balance between one’s desire for belonging/relationship, and the desire for freedom/independence.

I like how he says it in the Passionate Marriage,

People screaming, ‘I got to be me!’ ‘Don’t fence me in!’ and ‘I need space!’ are not highly differentiated. Just the opposite. They are fearful of ‘disappearing’ in a relationship and do thing to avoid their partner’s emotional engulfment. Some create distance; others keep their relationship in constant upheaval. Declaring your boundaries is an important early step in the differentiation process, but it’s done in the context of staying in relationship (that is, close proximity and restricted space). This is quite different from poorly differentiated people who attempt to always ‘keep the door open’ and who bolt as increasing importance of the relationship makes them feel like they’re being locked up. The process of holding onto your sense of self in an intense emotional relationship is what develops differentiation (Passionate Marriage, pp. 67).

Is the concept of differentation new to you?

Do you find yourself struggling between belonging and independence in your relationships?