The first sentence means that after a person has a culture, he will gain knowledge from books and will not be indifferent to the things around him. In essence, when people have knowledge and master the way of thinking, they will think about problems, or the more they know, the more they don't know, and even the desire for knowledge will make people worry.

The second sentence, the original sentence is, people say that the sunset is the end of the world, and you can't see your home when you look at the end of the world. It shows the author's strong feelings and helplessness of missing his hometown.