Hawzah News Agency - A number of our people have narrated from Sahl ibn Ziyad from ‘Ubaydallah al-Dihqan from Ahmad ibn ‘Umar al-Halabi from Yahya ibn ‘Umran from Abu ‘Abdillah (al-Sadiq)  that Amir al-Mu'minin  used to say: 

الْعَقْلِ اسْتُخْرِجَ غَوْرُ الْحِكْمَةِ وَبِالْحِكْمَةِ اسْتُخْرِجَ غَوْرُ الْعَقْلِ وَبِحُسْنِ السِّيَاسَةِ يَكُونُ الادَبُ الصَّالِحُ قَالَ وَكَانَ يَقُولُ التَّفَكُّرُ حَيَاةُ قَلْبِ الْبَصِيرِ كَمَا يَمْشِي الْمَاشِي فِي الظُّلُمَاتِ بِالنُّورِ بِحُسْنِ التَّخَلُّصِ وَقِلَّةِ التَّرَبُّصِ.

“Through intellect, the essence of wisdom is extracted, and through wisdom, the essence of intellect is extracted. With good governance [of one's actions], righteous manners will be formed." He also used to say, "Contemplation is the life of the discerning heart, just as one walks in darkness with light, through the good purification and minimal hesitation."

Al-Kāfi, v.1