Imam Jafar bin Muhammad As-Sadiq (AS), sixth infallible heir of Prophet Muhammad (SW), was martyred on 15 Shawal while according to some other traditions he kissed martyrdom on Shawal 25, and was buried in the cemetery of Al-Baqi in the holy city of Medina, Saudi Arabia.

Some of his quotes are:

The unintelligent is fit for nothing and the unknowledgeable is unintelligent. He who understands will be excellent and he who is clement will be triumphant.

Knowledge is protection, honesty is glory, ignorance is humility, understanding is honor, openhandedness is success, and good mannerism achieves affection.

The knowing of the manners of his time will not be attacked by the mysteries. Judiciousness is the lantern of doubt.

Allah is the custodian of him who knows His and the enemy of him who ignores Him. The intelligent should be forgiver and the ignorant is treacherous.

If you want to be respected, you should be lenient and if you want to be disrespected, you may be severe. The heart of him whose lineage is honorable is surely soft while he whose race is ignoble is surely hard-hearted.

He who neglects will be engaged (in troubles). He who cares for the result will act slowly in matters that he ignores.

He who involves himself in a matter with which he does not have full acquaintance will debase himself.

He who does not know will not understand, he who does not understand will not be safe, he who is not safe will not be respected, he who is not respected will feel disappointed, he who feels disappointed will be blamed, and he who is blamed will be worthy of regret.

If you can hide your personality from people, do it. You should not care if people do not praise you and you should not care if people disregard you when Allah honors you.

Amirul Muminin(A.S.) used to say: "Life is worthless for everyone except two men: A man whose acts of charity are day by day increasable and a man who corrects his death by means of repentance." If you can keep yourself indoors, do it. When you go out (of your house), you should avoid backbiting, telling untruths, envying, showing off, flattering, and sweet-talking.

The cell of the believer is his house where he detains himself, his sight, his tongue, and his genitals.

He who acknowledges the favors of Allah in his heart before he expresses his gratitude by words deserves increase of Allah.

Many are those whom are tempted by receiving graces of Allah, many are those whom are trapped by the concealment of their flaws, and many are those whom are cheated by wording of praise.

Reference: Tohaf al-Uqool