Maybe private worlds are all there are. Talking about them is a way of conjuring gravity between them, a way to pull them near and make them matter to each other. I mean, to make any one of them matter at all. Certainly the force of describing them also changes them.
But it can’t be better to say nothing.
Everyone lives alone in families. Everyone goes alone into action, love, and work. Sometimes, it’s why we work. Everyone goes alone into sickness, too.