Based on the Drake equation, there should be millions of civilizations in the universe that are intelligent to communicate with others in their light sphere. Why don't we notice any of them? It may be possible that they're more advanced in their evolution to understand the meaning of existence and the unity of life everywhere.
It may be possible that they understand their own individual self is part of the Self or Being that comprise the entire existence in the world. On the other hand, there may be species out there, which have not yet evolved to develop science and technology. In the Srimad Bhagavatam, it is written that Narada, a rishi, was able to traverse the universe to teach others of the Vedic knowledge. So, if this is true, then there are other civilizations which have learned the wisdom from Narada and his disciples. If so, they may have learned that the Bliss is everywhere in the universe and may have already understood us in their consciousness even before we met them. https://www.youtube.com/watch?v=cBVUdEQXvmc https://www.youtube.com/watch?v=cBVUdEQXvmc