About the Greatness of Ahlu'l-bayt
 
"By Allah, I have knowledge of the conveyance of messages, fulfillment of promises and of entire expressions. We the people of the house (of the Prophet-Ahlu'l-bayt) possess the doors of wisdom and light of governance. Beware that the paths of religion are one and its highways are straight. He who follows them achieves the aim and secures the objective. And he who stood away from it went astray and incurred repentance."
 

Nahjul Balagha, Sermon 119, p. 267

About the Ahlu'l-bayt:
 
"He who has an intelligent mind looks to its goal. He knows his low road as well as his high road. The caller has called. The shepherd has tended his flocks. So respond to the caller and follow the shepherd."
 

Nahjul Balagha, Sermon 153, p. 314

About Preaching and Counseling:
 
"Allah may bless him who listens to a point of wisdom and retains it, when he is invited to the right path he approaches it, he follows a leader (by catching his waist band) and finds salvation, keeps Allah before his eyes and fears his sins, performs actions sincerely and acts virtuously, earns treasure of heavenly rewards, avoids vice, aims at (good) objective and reaps recompense, faces his desires and rejects (fake) hopes, makes endurance the means of his salvation and piety the provision for his death, rides on the path of honour and sticks to the highway of the truth, makes good use of his time and hastens towards end and takes with him the provision of (good) actions."
 

Nahjul Balagha, Sermon 153, p. 314