The world that seemed so various and new, well, it does contract. One's burning desire to investigate human behavior, and to make, or imply, statements about it, does fall off. And so one does find that early works are full of energy and also full of vulgarity, crudity, and incompetence, and later works are more carefully finished, and in that sense better literary products. But . . . there's often a freshness that is missing in later works--for every gain there's a loss. I think it evens out in that way.
Kingsley Amis
