To have a thing is convenient for our life and to create high quality of life. So far, when I found a nice book at the book store I got it. But my bookshelves were filled with books. If I get a new book, I must throw away some books to keep new book. But actually it is quite difficult to throw away . Then I must get a new bookshelves and I must make a new room for that. So I gave up to get a new book I knew to have things had a down side. To get something which I want looks nice but I must think of the way to keep it. Now a days I examine my ability to keep it before I get it.