Here’s an extensive quote from the speech Bellow gave when he accepted the Nobel Prize for Literature in 1976:
The essence of our real condition, the complexity, the confusion, the pain of it is shown to us in glimpses, in what Proust and Tolstoy thought of as “true impressions”. This essence reveals, and then conceals itself. When it goes away it leaves us again in doubt. But we never seem to lose our connection with the depths from which these glimpses come. The sense of our real powers, powers we seem to derive from the universe itself, also comes and goes. We are reluctant to talk about this because there is nothing we can prove, because our language is inadequate and because few people are willing to risk talking about it. They would have to say, “There is a spirit” and that is taboo. So almost everyone keeps quiet about it, although almost everyone is aware of it.
The value of literature lies in these intermittent “true impressions”. A novel moves back and forth between the world of objects, of actions, of appearances, and that other world from which these “true impressions” come and which moves us to believe that the good we hang onto so tenaciously – in the face of evil, so obstinately – is no illusion.
No one who has spent years in the writing of novels can be unaware of this. The novel can’t be compared to the epic, or to the monuments of poetic drama. But it is the best we can do just now. It is a sort of latter-day lean-to, a hovel in which the spirit takes shelter. A novel is balanced between a few true impressions and the multitude of false ones that make up most of what we call life. It tells us that for every human being there is a diversity of existences, that the single existence is itself an illusion in part, that these many existences signify something, tend to something, fulfil something; it promises us meaning, harmony and even justice. What Conrad said was true, art attempts to find in the universe, in matter as well as in the facts of life, what is fundamental, enduring, essential.