You want a real jihad? Smile to your parents when you come home. Pray on time. Control your tongue, remind your brothers and sisters not to loosen theirs. Control your eyes, and control your thoughts.

The seed of doubtfulness lies in confusion.

Amir Al-Mumineen (عليه السلام), Ghurār Al-Hikām, H.1064 (translated from the Arabic Hikmā)

It (piety) brings back sight to the eyes blinded by ignorance of truth.

Imam Ali (a.s.)

Source: Nahjul Balagha, Letter 198

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