I swear

When you swear to do something, you bind yourself to the action that follows the
"I swear...." According to Austin, in order for this speech act to be happy, you have to follow through with the actions you have committed yourself to. If I swore to read a book in a week even with the proper intent, it will only be a happy if I actually read a book in a week. Many people have gotten into the habit of swearing to something but not actually following through. For example, if you wanted to get someone to do something, you could say, "I swear if you don't do blank, I will do blank." Now most people do not have any intention to follow through, they are just hoping the threat will scare the other person into action. So is this speech act unhappy?
According to Austin's conditions for speech acts, "Where, as often, the procedure is designed for use by persons having certain thoughts or feelings...then a person participating in and so invoking the procedure must in fact have those thoughts or feelings...." If we separate a traditional "I swear..." form a threatening "I swear...", the threatening "I swear..." will meet the above condition. The thought associated with a threatening "I swear..." is to scare someone into action. Well, when you invoke this speech action, you usually are in the mood to intimidate someone, so the speech action retains its happiness. Since the intention of the speech action was to threaten someone and not to bind oneself to an action, the performative utterance is happy.