this is not necessary for the senses for there is no opposite to their perceptions but they may perceive or not perceive and there is nothing between them except the opposition of existence and nonexistence. so it is no wonder that we say he perceives with some of his parts such as the eye and ear and he does not perceive with the rest of his body and there is no contradiction in that.
ولا يلزم هذا في الحواس فإنه لا ضد لإدراكاتها ولكنه قد يدرك وقد لا يدرك فليس بينهما إلا تقابل الوجود والعدم. فلا جرم نقول يدرك ببعض أجزائه كالعين والأذن ولا يدرك بسائر بدنه، وليس فيه تناقض.