"There are some human problems, after all, that have no solution. There are some relationships, both among human beings and between human beings and the nonhuman world, about which no one can have the last word. This is true not only of science and philosophy, where it is obvious that final understanding about nature and its laws, and about being and becoming, has not been achieved by anyone and never will be; it is also true of such familiar and everyday matters as the relation between men and women, or parents and children, or man and God. These are matters about which you cannot think too much, or too well. The greatest books can help you think better about them, because they were written by men and women who thought better than other people about them."