Ja'far al-Sadiq: Good

“One who does not use his intelligence will not succeed and one who does not use his knowledge will have no intellect. One who understands will attain nobility and excellence, and one who is tolerant will triumph. Knowledge is a shield (against evil), truth begets honour and ignorance disgrace, understanding is distinction, generosity is salvation and good manners command love and respect.”

Ja'far al-Sadiq

Muhammad Kulayni, Usūl al-Kāfī - The Book of Intellect and Ignorance.
Regarding Knowledge & Wisdom, General

Love , Truth , Intelligence , Understanding

“The believers have four signs: good humor, tactfulness, kind heartedness and openhandedness”

Ja'far al-Sadiq

Muhammad al-Hur al-Aamili, Wasā'il al-Shī‘ah, vol.6, p. 321
Religous Wisdom

“When a man asked him whether God coerced his bondsmen to sin. Al-Sadiq replied "Allah is more just than to make them commit misdeeds then chastise them for what they have done." The man further asked, "Has he empowered them with their actions?" al-Sadiq said, "If He had delegated it to them, He would have not confined them to enjoining good and forbidding evil." The man further asked, "Is there a station or a position between the two?"”

Ja'far al-Sadiq

The Imam said, "Yes, wider than [the space] between the heaven and the earth."
Views on free will
Source: [Nasr & Leaman, The History of Islamic Philosophy, February 1, 1996, Routledge, 978-0415056670, 256-257, 1, http://www.amazon.com/History-Islamic-Philosophy-Routledge-Philosophies/dp/0415056675]

God , Evil

“There are three things that signify the magnanimity of a person: good temper, patience, and to avoid aggressive gaze.”

Ja'far al-Sadiq

Majlisi, Bihārul Anwār, vol.78, p. 232
General Quotes

Personality , Patience

“Then I (al- Sadiq) asked him (the thief) about his act. He said: 'perhaps, you are Ja'far b. Mohammed?' 'Yes,' I said. He said to me:'What does your noble origin avail you while you are ignorant?' 'Which verse of the Quran am I ignorant at?' I asked. He said these Words of Allah, the Great and Almighty:Whoever brings a good deed, he shall have ten like it, and whoever brings and evil deed he shall be recompensed only with the like of it.(Quran, 6:160) 'When I stole the two loaves of bread, they were two evil deeds. And When I stole the two pomegranates, they were two evil deeds, too. So these are four evil deeds. When I gave each one of them as alms, Allah has subtracted 4 evil deeds from 40 good deeds. So, I have 36 good deeds.' I (al- Sâdiq) said: 'May your mother loses you! It is you who are ignorant at the Book of Allah. Have you not heard that Allah said: (Allah) accepts-(deeds) from the pious only.(Quran, 5:27) When you stole the two loaves of bread, they were two evil deeds. And when you stole the two pomegranates, they were two evil deeds, too. And when you gave them to other than their owner without the permission of their owner, you have added four evil deeds to the four evil deeds, and you have not added four evil deeds to forty good deeds. So, he began looking at me. Then I left him and went away.”

Ja'far al-Sadiq

Tafsir

Books , Evil