The light of the Soul is the Aql (esoteric wisdom)...

The light of the Soul is the Aql (esoteric wisdom), if the servant is intelligent, he will be having the acknowledge of his Lord (an extract).

[4] Good Morals emanate from the Aql: عنه، عن الحسين بن يزيد النوفلي وجهم بن حكيم المدايني، عن إسماعيل بن أبي زياد السكوني، عن أبي عبد الله، عن آبائه عليهم السلام قال: قال رسول الله صلى الله عليه وآله: إذا بلغكم عن رجل حسن حاله فانظروا في حسن خلقه فانما يجازى بعقله From him, from Al Husayn Bin Yazeed Al Nowfaly and Jahm Bin Hakeem Al Mada’iny, from Ismail Bin Abu Zyad Al Sakuny, (It has been narrated) from Abu Abdullah -asws , from his forefathers -asws having said: ‘Rasool-Allah -saww said: ‘When it reaches you about a man, the goodness of his state, so look at him with regards to the goodness of his morals, for it is the recompense of his ‘بعقله’ Aql (esoteric wisdom)’.

[5] The difference between the wickedness and the Aql: وعنه، عن محمد بن أحمد بن يحيى، عن محمد بن عبد الجبار، عن بعض أصحابنا رفعه إلى أبي عبد الله عليه السلام قال: قلت له: ما العقل؟ – قال: ما عبد به الرحمن واكتسب به الجنان، قال: قلت: فالذي كان في معاوية؟ – قال: تلك النكراء وتلك الشيطنة، وهي شبيهة بالعقل وليست بعقل.

From him, from Muhammad Bin Ahmad Bin Yahya, from Muhammad Bin Abdul Jabbar, from sone of our companions, The narrator says: ‘I said to Abu Abdullah -asws : ‘What is the ‘العقل’ intellect?’ He -asws said: ‘What the Beneficent is worshipped by, and the Paradise is attained by’. I said, ‘So that which was with Muawiya?’ He -asws said: ‘تلك النكراء وتلك الشيطنة’ ‘that was the heinous (wicked), and that was the devilish, but it resembles with the intellect, but it is not with the intellect’.

[6] The Possessor of the Aql: عنه، عن بعض أصحابنا، رفعه قال: قال: العاقل لا يحدث من يخاف تكذيبه، ولا يسأل من يخاف منعه، ولا يتقدم على ما يخاف العذر منه، ولا يرجو من لا يوثق برجائه From him, from one of our companions, raising it, said, ‘He -asws said: ‘العاقل (the possessor of Aql) does not discuss with the one whom he fears would belie him, nor does he ask one whom he fears would refuse him, nor does he embark upon (a matter) for which he fears failure, nor does he hope in one who cannot be trusted with his hopes’.

[7] عنه، عن بعض أصحابنا، رفعه قال: قال أبو عبد الله عليه السلام: يستدل بكتاب الرجل على عقله وموضع بصيرته، وبرسوله على فهمه وفطنته.