It's true that he would come to himself at once, and yet, if he were asked what he had been thinking about while standing there, he would most likely not remember, but would most likely keep hidden away in himself the impression he had been under while contemplating. These impressions are dear to him, and he is most likely storing them up imperceptibly and even without realizing it--why and what for, of course, he does not know either; perhaps suddenly, having stored up his impressions over many years, he will drop everything and wander off to Jerusalem to save his soul, or perhaps he will suddenly burn down his native village, or perhaps he will do both. There are plenty of contemplators among the people. Most likely Smerdyakov, too, was such a contemplator, and most likely he, too, was greedily storing up his impressions, almost without knowing why himself.