 Aristotle distinguishes two kinds of akrasia: impetuosity (propeteia) and weakness (astheneia). The person who is weak goes through a process of deliberation and makes a choice; but rather than act in accordance with his reasoned choice, he acts under the influence of a passion. By contrast, the impetuous person does not go through a process of deliberation and does not make a reasoned choice; he simply acts under the influence of a passion. At the time of action, the impetuous person experiences no internal conflict. But once his act has been completed, he regrets what he has done. One could say that he deliberates, if deliberation were something that post-dated rather than preceded action; but the thought process he goes through after he acts comes too late to save him from error.