"And as to the other question you have not asked—we never interfere with local cultures, for the greater the variety of each, the greater the enrichment of all. Your system is entirely safe; we propose to observe it more closely from now on. It is our impression, however, that you would be wise not to mention the galactic system we represent, when you return to your Earth. It would be too upsetting to the established pattern. We are all human beings, but we have solved the same problems in very different ways."
"We have not solved ours," Fred said.
"Oh, neither have we. But at least the few of us here, including yourselves, at any time as our guests, have achieved what you would probably call immortality."
"We are free to accept your invitation at any time?"
"Certainly."
"Then we will report that no other envoy is needed," Pat said clearly.
"That would be beneficial indeed."
"And may we send you a very limited number of friends?"
"Your guests shall be our guests. Again, we suggest you limit knowledge of us so far as possible."
"We are called Divers because we can leave our bodies. Only Divers could visit you in this way, and we will not send any others."