 and what is inferred from that is that they have thoroughly and thoroughly studied this subject and have reached its utmost limit and become familiar with it is that the sword until it is worn by someone who wears it or is struck by someone who strikes with it has passed through many hands and through classes of craftsmen each one of whom does not do the work of his companion nor does he improve it nor does he claim it nor does he burden himself with it because the one who melts the iron of the sword and softens it and refines it and polishes it is not the one who sharpens it and delays it and the one who sharpens it and delays it
ومما يستدل به على أنهم قد استقصوا هذا الباب واستغرقوا، وبلغوا أقصى غايته وتعرفوه، أن السيف إلى أن يتقلده متقلد، أو يضرب به ضارب، قد مر على أيد كثيرة، وعلى طبقات من الصناع، كل واحد منهم لا يعمل عمل صاحبه، ولا يحسنه ولا يدعيه ولا يتكلفه، لأن الذي يذيب حديد السيف ويميعه، ويصفيه ويهذبه، غير الذي يمده ويمطله؛ والذي يمده ويمطله