You will observe over the larger part of the sphere a smear of liquid. It is on this film of liquid that the profusion of life depends. (This planet knows nothing of the little scum of life on its surface: the planet has other ideas of itself, as we know; but that is not our concern here.) The point of the exercise is this: to understand that the proliferation of organic possibilities, the harvest of potentiality which is Shikasta, depends, from one point of view, on a scrape of liquid that could be drunk in a moment by a rogue star, or shaken off like puddle-mud from a child's ball during a game if a comet came in from elsewhere. Which event would be, after all, not without its precedents!

For instance. Adjust yourself to the various levels of being which lie in concentric shells around the planet, six of them in all, and none requiring much effort from you, since you will be entering and leaving them so quickly - none save the last Shell, or Circle, or Zone, Zone Six, which you must study in detail, since you will have to remain there for as long as it takes you to complete the various tasks you have been given: those which can be undertaken only through Zone Six. This is a hard place, full of dangers, but these can easily be dealt with, as is shown by the fact that not once have we ever lost one of our by now many hundreds of emissaries there, not even the most junior and inexperienced. Zone Six can present to the unprepared every sort of check, delay, and exhaustion. This is because the nature of this place is a strong emotion - "nostalgia" is their word for it - which means a longing for what has never been, or at least not in the form and shape imagined. Chimeras, ghosts, phantoms, the half-created and the unfulfilled throng there, but if you are on your guard and vigilant, there will be nothing you cannot deal with.