1. Intellect (áql) in the words of Imam Ali (a)

2. ‘Aql is the most powerful asset.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 4330]

3. ‘Aql is purified from evils and guides one to goodness.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #1350]

4. ‘Aql is a sharp cutting sword.
[Nahjul Balagha, saying# 424]

5. ‘Aql is the messenger of truth.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 1291]

6. ‘Aql is the reformer of ideas.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 815]

7. ‘Aql is a new dress that never gets old.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 2151]

8. ‘Aql is the stepladder to reach the high station of ‘illiyin.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 1292]

9. ‘Aql turns strange land into one’s own place.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 1325]

10. ‘Aql guides and delivers a person.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 1335]

11. ‘Aql has the same status in heart as a lamp in the middle of a house.
[al-Bihar al-Anwar, vol.1, p.99]

12. [Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 3354]
The best property of a person is his ‘aql. It elevates him if he loses his prestige, it lifts him if he falls down, it guides him if he is misguided from (true) path and it brings out right words when he speaks.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 3354]

13. Indeed ‘aql is the best of riches.
[Nahjul Balagha, saying # 38]

14. ‘Aql is the adoration of a person.
[al-Bihar al-Anwar, vol.1, p.95]

15. Perfection of human being is in his ‘aql.
[al-Bihar al-Anwar, vol.1, p.95]

16. ‘Aql is the originator of knowledge and calls to perception.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith # 1959]

17. From ‘aql springs the radiance of wisdom and from wisdom flows the radiance of ‘aql.
[al-Kafi, vol.1, p.28]

18. ‘Aql is the friend of every human being.
[al-Bihar al-Anwar, vol.78, p.92]

19. ‘Aql is the intimate friend of a believer.
[Tuhaf al-Uqool, saying # 303]

20. [Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #2100]
‘Aql is the companion of the party of rahman and evil desires are leaders of the party of shaitan (devil) and human soul is stretched between these two forces. The soul goes under the domination of the one who gets upper hand.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #2100]

21. The one who doesn’t have ‘aql, doesn’t have religion.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #10768]

22. A believer cannot have faith unless he has ‘aql.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #6184]

23. [Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #3887]
Verily having ‘aql means to abstain from sins, to keep an eye on the end and to always have foresight.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #3887]

24. [Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #2130]
Having ‘aql means to be modest, and not extravagant, fulfill the promise and not to break it, and when getting angry, be forbearing.
[Al-Amidi, Ghurar ul-Hikam wa Durar ul-Kalim, hadith #2130]