Regardless that these are babies, child or adults feel connected, safe, when the people in our lives SHOW they care about us, what we want, how we feel, and why. Shutting down, shutting those we ostensibly care about out, to self-protect, is destructive in the extreme.
From the clip:
“When she’s grounded, is comfortable in her world, she can explore, meet other people, try new things, as she’s got that safe base she can rely on.”
In other words, communication builds trust, and trust is the foundation of love.