To some extent there must be attachment and illusion, although as little as possible. For if there were no illusion and attachment, it would be as if it were day all the time and never night. Also in illusion and attachment there is a motive power, and by that motive power a purpose of life is accomplished. And if there were no illusion and attachment, the soul would not be able to hold the body, even to a small extent, because this it can only do through attachment. Many people who are very ill, sometimes for years and years, continue to be ill without dying; the reason is the attachment of the soul to the body.