necessarily existent is that which has no efficient cause. if by necessary existence what is meant is something other than an existent that has no efficient cause so that the sequence is interrupted by it then we do not accept that it is necessary at all. however broad the mind is to accept an eternal existent that has no cause for its existence it will be broad to accept an eternal described one that has no cause for its existence in its essence or in all of its attributes.
واجب الوجود ما ليس له علة فاعلية وإن أريد بواجب الوجود شيء سوى موجود ليس له علة فاعلية حتى ينقطع به التسلسل، فلا نسلم أن ذلك واجب أصلا. ومهما اتسع العقل لقبول موجود قديم لا علة لوجوده، اتسع لقبول قديم موصوف لا علة لوجوده في ذاته وفي صفاته جميعا.