18. It is plain from the fact that evil and falsity are the opposites of good and truth that truth cannot be linked with evil nor good with the falsity which comes from evil. If truth is attached to evil, it is no longer truth but falsity, since it has been falsified. And if good is attached to the falsity which comes from evil, it is no longer good but evil, since it has been adulterated. However, the falsity which does not come from evil can be linked with good.