This reminds me of the concept that in order to have a successful life partnership with another person, one first needs an internal sacred marriage between their masculine and feminine energies, which terms suck because they have nothing to do with gender constructs and thus can be confusing. I find this quote related as well.

“The purpose of a relationship is not to have another who might complete you, but to have another with whom you might share your completeness.” — Neale Donald Walsch from Conversations with God, Book 1