One of my brother's rules was that while facts never become obsolete or stale, commentaries always do. When a writer tries to explain too much, to psychologize, he's already out of time when he begins. Imagine Homer explaining the deeds of his heroes according to the old Greek philosophy, or the psychology of his time. Why, nobody would read Homer! Fortunately, Homer just gave us the images and the facts, and because of this the Iliad and the Odyssey are fresh in our time. And I think this is true about all writing. Once a writer tries to explain what the hero's motives are from a psychological point of view, he has already lost. This doesn't mean that I am against the psychological novel. There are some masters who have done it well. But I don't think it is a good thing for a writer, especially a young writer, to imitate them. Dostoyevsky, for example. If you can call him a writer of the psychological school; I'm not sure I do. He had his digressions and he tried to explain things in his own way, but even with him his basic power is in giving the facts.
Singer was a writer I wanted to read the minute I learned of his story 'The friend of Kafka'. Here is being interviewed in NY, in 1968.
http://www.theparisreview.org/interviews/4242/the-art-of-fiction-no-42-isaac-bashevis-singer