I don't think reading makes you a superior human being. There are more important things than cleverness and knowledge. Empathy, kindness, cheerfulness, humour, sensitivity to beauty, refined manners, etc, are all just as important. In fact, I prize empathy and kindness above everything.
However, I do think reading great literature changes people. Great novelists in particular broaden and deepen your mind. Writers like Dickens, Jane Austen, George Eliot, Thomas Hardy, etc, make you more tolerant and forgiving and humane. They 'humanise' and sensitize you. Of course, you don't have to read Virginia Woolf to be kind and sympathetic. Some of the finest human beings I have ever known have never read a book, let alone Virginia Woolf. But I would say that an average person (not particularly good or bad) who spends a year locked in a cell reading great literature would emerge better for it.
Also, I would make a distinction between cleverness and curiosity. I have known very clever people (i.e people with high IQs) who never read anything and seem totally uninterested in the world. And I have know people with average IQs who have an insatiable hunger to learn.
Personally, I find interested people interesting. And interested people generally read lots of books, not just the Brontes and Shakespeare but books on science and history and philosophy and religion and the natural world.