17) the fourth proof is their saying if the observer does not perceive the similarity between himself and his opponent then he thinks well of himself and is bad about his opponent. there is no wonder for this delusion is one of the things that takes hold of people and it is their passion for their opinions and the quality of their minds even if that is one of the signs of foolishness. rather what is surprising is that he does not perceive the similarity between his two states. how many times has he seen himself in one state and then his state changed so he believed in something for a period and judged that it was the truth that the true mind requires then a thought occurs to him and he believes its opposite. he claims that he has now become aware of the truth and that what he believed before was an illusion that he was deceived by and he sees himself with a firm belief in the second case that is equal to his previous belief for he was firm in his convictions as he is now. i wonder where he can be safe from being deceived and that he will become aware of a matter that will show him that what he believes now is false and there is no observer who does not believe the same thing repeatedly then he continues to be proud at the end of his belief that is similar to the rest of his beliefs that he abandoned and knew were false after he had resolved to accept them and was certain of them.
 الدلالة الرابعة قولهم الناظر ان كان لا يدرك المماثلة بين نفسه وبين خصمه فيسحن الظن بنفسه ويسئ بخصمه فلا غرو فإن هذا الغرور مما يستولي على الخلق وهو شغفهم بآرائهم وجودة عقولهم وان كان ذلك من من أدلة الحماقة وانما العجب أنه لا يدرك المماثلة بين حالتيه وكم رأى نفسه في حالة واحدة وقد تحولت حالته فاعتقد الشئ مدة وحكم بانه الحق الذي يوجبه العقل الصادق ثم يخطر له خاطر فيعتقد نقيضه ويزعم انه الآن تنبه للحق وما كان يعتقد من قبل فخيال انخدع به ويرى نفسه على اعتقاد قاطع في الحالة الثانية تساوي اعتقاده السابق فانه كان قاطعا بمثل قطعه الان فليت شعري من أين يأمن الانخداع وانه سيتنبه لأمر يتبين به ان ما يعتقده الان باطل وما من ناظر الا ويعتقد مثله مرارا ثم لا يزال يعتز آخرا بمعتقده الذي يماثل سائر معتقداته التي تركها وعرف بطلانها بعد التصميم عليها والقطع بها