and the other needs. if we assume that each one is selfsufficient then they are both necessarily existent which is the absolute duality and this is impossible. or that each one of them needs the other then neither of them is necessarily existent since the meaning of necessarily existent is that which exists by itself and is independent in every respect of others. so whatever needs others that other is its cause since if that other were removed its existence would be impossible and its existence would not be from itself but from others. and if it is said one of them needs and the other does not then the one who needs is the effect and the necessary existence is the other and whatever is the effect it is in need of a cause which leads to the necessary existences essence being connected to a cause.
ويحتاج الآخر. فإن فرض كل واحد مستغنيا فهما واجبا وجود وهو التثنية المطلقة وهو محال. وإما أن يحتاج كل واحد منهما إلى الآخر فلا يكون واحد منهما واجب الوجود، إذ معنى واجب الوجود ما قوامه بذاته وهو مستغن من كل وجه عن غيره، فما احتاج إلى غيره فذك الغير علته، إذ لو رفع ذلك الغير لامتنع وجوده فلا يكون وجوده من ذاته بل من غيره. وإن قيل أحدهما يحتاج دون الآخر، فالذي يحتاج معلول والواجب الوجود هو الآخر، ومهما كان معلولا افتقر إلى سبب، فيؤدي إلى أن ترتبط ذات واجب الوجود بسبب.