` No , I 'll look first , ' she said , ` and see whether it 's marked `` poison '' or not ' ; for she had read several nice little histories about children who had got burnt , and eaten up by wild beasts and other unpleasant things , all because they WOULD not remember the simple rules their friends had taught them : such as , that a red-hot poker will burn you if you hold it too long ; and that if you cut your finger VERY deeply with a knife , it usually bleeds ; and she had never forgotten that , if you drink much from a bottle marked ` poison , ' it is almost certain to disagree with you , sooner or later .