This capacity of qualification is attributed to the pleasure, therefore it is for the search of beneficial objects to the vital movement, that is, necessary the conservation of the life that if characterizes a positive sensation, in the case the pleasure. The pleasure desire is had as survival factor human being, as well as the rejection to all negative sensation, configures the displeasure and is attributed to the harmful object the life. Studying the mechanics of the passions in Hobbes we could ask: how if it can desire or reject something that if is unaware of? Or still the individual always goes to love or to hate one definitive object? Hobbes clarifies these questions in it capitulates VI of the workmanship the Leviat when it says: Because of the things that entirely we are unaware of, or whose existence we do not believe, we cannot have another desire that not to prove it and to try. But we have aversion, not only for things that we know to have caused them damage, but also for that we do not know if they can or not cause us damage. Of the things that we do not desire nor we hate if it says we disdain that them. Not being the disdain another thing seno an immobility or contempt of court of the heart, when resisting the action of certain things.
Which drift of the fact of the heart to be already stimulated in different way for more powerful objects, or of the lack of experience of those things. In the trilogy of the passions of Hobbes we point out the desire preceding the pleasure that leads to the love. The proximity between desire and love is made by the bridge of the pleasure, since Hobbes attributes to desire the absence of the loved object and love the presence of the object long ago desired.