Such companions might be down the street, across town, or halfway around the world. Such friendship goes beyond time and space. These friends know themselves so well, thus, know you. You can actually finish each other's sentences.
The real beauty lies in that neither party expects anything from the other; they simply love. They don't even have to say much to each other, necessarily, for Silence speaks truth. How delightfully counter cultural!
Deep friends like this don't seek each other, they find each other. It truly seems a movement of the Holy Spirit that brings them together.