Read it through once

What, then, are those materials? They are moods, sensations, ephemeral thoughts. They are the little things that make up consciousness — the associations that pass through the mind in a moment, the sudden guesses, the reflections, the recollections, the fleeting images that come and go. The novelist who can reproduce these things will have caught something of the truth of life. He will make his characters live by presenting not their actions only but their thoughts — not as mere explanations of action, but as part of a continuous flow which is in itself significant.