When I find a soul who speaks the same language as me, who seems to be on the same wavelength, the phrase kindred spirits from the Anne of Green Gables novels pops into my head.
It’s such a lovely sentiment to describe exactly that feeling of understanding someone, without the dance of mismatched conversation. Instead, it’s that instant recognition of meeting on the same page, without any effort. Existing on similar planes, is another way I think about it.