At least believe this many humans, who are interested obviously in this topic. Many of them visited me after lectures and meetings, in hope that I can give concrete answers to their questions. For it was clear: If that does not know it, who is to then know it?
I spoke with many spacemen and Apollo astronauts concerning this. None of them ever saw a UFO or several.
I think for being not unsympathetic that their appearance may also appear, so differently it, must; similarly as with animals, which meet us in very different forms, which look somehow harmonious however all. On exactly such forms I would stand.
Space travel opens really completely new horizons. It unites humans and at the same time different ways of thinking.
The SETI research has certainly its authorization, even if we will probably never experience over radio waves from the existence of strange cultures.