After he uses Mr. Jonas's air and begins to get better, it is clear that the worst is over for Douglas. He has come to terms, somehow, with life, and therefore, with death. Douglas did so not through rational means, but through emotions, and this is because life itself is not something that we can understand rationally. Everyone has to deal with his or her mortality, and while there is no equation or solution to the problem of death, the enjoyment of life seems to be a good start. For a while life itself had become difficult for Douglas, because death overshadowed it. Mr. Jonas' gift helped bring the features back into balance. Life is to be enjoyed, and death may be pondered, but to worry incessantly about one's morality is useless. Bradbury seems to suggest that since we cannot change the fact that we will die, we might as well take full advantage of life while we can.