as for the blue and the discerning it is that they said that the caller should be intelligent clever with correct intuition true discernment and attentive to the inner selves by looking at the characteristics and appearances. he should be able to do three things. the first and it is the most important is to distinguish between those whom it is permissible to hope to lure and to trust the softness of his nature to accept what is presented to him contrary to his belief. there is a man who is rigid in what he hears and cannot extract from himself what is firmly rooted in him. so the caller should not waste his words with such a person and should cut off
اما الزرق والتفرس فهو انهم قالوا ينبغي أن يكون الداعي فطنا ذكيا صحيح الحدس صادق الفراسة متفطنا للبواطن بالنظر الى الشمائل والظواهر وليكن قادرا على ثلاثة امور الاول وهو اهمها ان يميز بين من يجوز ان يطمع في استدراجه ويوثق بلين عريكته لقبول ما يلقى اليه على خلاف معتقده فرب رجل جمود على ما سمعه لا يمكن ان ينتزع من نفسه ما يرسخ فيه فلا يضيعن الداعي كلامه مع مثل هذا وليقطع