This effort to make every one approve what we love or hate is in truth ambition, and so we see that each person by nature desires that other persons should live according to his way of thinking; but if every one does this, then all are a hindrance to one another, and if every one wishes to be praised or beloved by the rest, then they all hate one another. _The Varieties of Emotion_ Joy and sorrow, and consequently the emotions which are compounded of these or derived from them, are passions. But we necessarily suffer in so far as we have inadequate ideas, and only in so far as we have them; that is to say, we necessarily suffer only in so far as we imagine, or in so far as we are affected by a modification which involves the nature of our body and that of an external body. The nature, therefore, of each passion must necessarily be explained in such a manner, that the nature of the object by which we are affected is expressed. The joy, for example, which springs from an object _A_ involves the nature of that object _A_, and the joy which springs from _B_ involves the nature of that object _B_, and therefore these two emotions of joy are of a different nature, because they arise from causes of a different nature. In like manner the emotion of sorrow which arises from one object is of a different kind from that which arises from another cause, and the same thing is to be understood of love, hatred, hope, fear, vacillation of mind, etc.; so that there are necessarily just as many kinds of joy, sorrow, love, hatred, etc., as there are kinds of objects by which we are affected. But desire is the essence itself or nature of a person in so far as this nature is conceived from its given constitution as determined towards any action, and therefore as a person is affected by external causes with this or that kind of joy, sorrow, love, hatred, etc., that is to say, as his nature is constituted in this or that way, so must his desire vary and the nature of one desire differ from that of another, just as the emotions from which each desire arises differ. There are as many kinds of desires, therefore, as there are kinds of joy, sorrow, love, etc., and, consequently (as we have just shown), as there are kinds of objects by which we are affected.