There are many 'oughts' which are opposed to other `ougths'...
There are many 'oughts' which are opposed to other `ougths' and so such 'oughts' are not of an ethical nature. But man, by virtue of his soul, enjoys a station which-like man's physical nature, to which his outward will and thought are subject-draws him towards its own goals. Man's physical nature draws him towards its goals in order to attain its own perfection. It needs food, and we say we ought-to eat food.
According to Schopenhauer, we are made to feel pleasure and to be on look out for pleasure in the world of ideas, while we are unaware of the fact that within our inner being it is nature which seeks to achieve its ends. It is nature that moves towards its end, but it provides pleasure for us in order to make us serve its own purposes. While in the world of ideas we are drawn towards pleasure, in reality we move to fulfill the goals of nature.
For example, when the baby cries, it is nature which seeks to bring him up. When the baby cries due to the feeling of pain, it is nature which declares its need, having subjected the baby's feeling and mind. Man enjoys a certain spiritual perfection and sublimity which is rooted in his God-given nobility and dignity (some 'oughts' are meant to achieve that spiritual perfection).
When someone says, `I ought to do such and such a thing,' it means `I must attain to that excellence,' although such a goal may not be reflected in his outer consciousness. Those excellences are common to all men, and, therefore, in this respect all men feel the same kind of imperative. The second justification for universal imperatives is the issue of social spirit. It is said that man is a social creature and he has certain oughts, to meet not his individual but his social needs.
In the same kay that man is impelled to seek the satisfaction of his individual needs he is impelled to seek the satisfaction of his social needs. Had there been no relations between man and his fellow men, such oughts would not have arisen. For instance, if I had no relations with anyone I would not make any efforts to feed other people. Such imperatives are related to a higher self, be it an individual higher self or a higher social self. That higher self seeks to achieve its goals.
That self causes man to perform moral acts. Those acts which are performed for the sake of the higher individual self or the social self have permanent principles, which are, firstly, universal and same for all individuals and, secondly, are permanent and not temporary.