Series of coincidences. Lady happens to be rich, takes him home because husband happens to be ill and have his own doctor. Hence they are vulnerable to seduction by whatever powers happen at any moment to be in control of the mass media. For Being There exists simultaneously on the levels of fiction and fact, fantasy and contemporary history. It is a novel ingeniously conceived and endowed with some of the magical significance of myth.
Chance tells time by how large plants have grown.
Gives Chance an inner peace because he moves among the plants at a natural rhythm. Because the author shows other people also interpreting the outside world via TV, Kosinski seems to be saying that we are all like Chance. Creates its own light, color, time, smooths everything out into one big mix. Creates his sense of self by changing the dial, by bringing other people to him at will. Thus he came to believe that it was he, Chance, and no one else, who made himself be.