so when he has finished with that let him consider what kind of matter the servant he takes is fit for what kind of craft he adopts and what kind of work he appears to excel in so let him assign it to him and let him be content with it. and let him not transfer the servant from one job to another nor let him change him from one craft to another for that is one of the strongest causes of destruction and the strongest incentives to corruption. and the one who does that is only like the one who assigns horses to the grazing and cattle to the rearing for every person has a door to knowledge and a kind of craft that his nature has allowed him to do and his instinct has informed him of so that it has become like nature to him. which there is no way to leave and the tax that there is no way to leave. so when the servant moves from what he has mastered mastered practiced worn familiarized himself with and become accustomed to to what he chooses for him by his opinion and selects for him by his will from what conflicts with his nature and opposes his essence he will spoil the system of his service and force him in the path of his profession so he returns like a meadow then he does not benefit from what he moved to him in a single chapter except by forgetting chapters of what he moved from it. and when he returns with him to the first matter he finds him in a worse state than he was in what he moved to him.
فإذا فرغ من ذلك فلينظر لأي أمر يصلح الخادم الذي يتخذه وأي صناعة ينتحل وما الذي يظهر رجحانه فيه من الأعمال فليسنده إليه وليستكفه إياه ولا ينقلن الخادم من عمل إلى عمل ولا يحولنه من صناعة إلى صناعة فإن ذلك من أمتن أسباب الدمار وأقوى دواعي الفساد وما يشبه من يفعل ذلك إلا بمن يكلف الخيل الكراب والبقر الأحضار لأن لكل إنسان بابا من المعارف وفنا من الصناعات قد سمح له به طباعه وإفادته إياه غريزته فصار لديه كالسجية التي لا حيلة في تركها والضريبة التي لا سبيل إلى مفارقتها فمتى نقل الإنسان الخادم مما قد أحسنه وأتقنه ومارسه ولابسة وألفة واعتاده إلى ما يختاره له برأيه وينتخبه له بإرادته مما ينافر طباعه ويضاد جوهره أفسد عليه نظام خدمته وجبره في طريق مهنته فعاد كالريض ثم لا يفيده مما نقله إليه بابا إلا بنسيان أبواب مما نقله عنه ومتى عاد به إلى الأمر الأول وجده فيه أسوأ حالا منه فيما نقله إليه