The familiar gives us trust and grounding. To have this disrupted, fear replaces trust. Known and recognized are ideas of the familiar, somehow this has increased the concept of fame. A familiar can be a conduit to helping increase focus and relaxation. Many wise folks had animal familiars.
Many adaptations of family include the unconditional support we are at some point, likely to need. Intimate associates usually have similar rhythm and chemistry.
Tribe, clan, lineage are some of the ways to describe a group you belong to.
In the metaphysical world the psyches are connected through the invisible connections. Anxiety is contagious. But illogical humor and playfulness are also transferred through the ephemeral.
It would seem with the lack of trust that is prevalent, we need to form attachments of similar hopes and dreams. A family you grew up with has insights about you that can be nurturing. Even if you were separated by geography or philosophy, you will resonate to certain familiarities. To think broadly about different cultures is a plus. Often though, the intangible memories do escape you in retrospect.
The dream of unconditional love, like merging continuously with another is fleeting. Yes, it exists but like moods it mutates. Hang on to the dream, and know when it is not there, it will reappear.