Imam Jafar al-Sadeq (a.s.) informed, “Allah – Blessed and High be He – sent down in the Quran an explanation for everything. By Allah! He has not left anything which the people need and nobody can say, ‘If this was revealed in the Quran’ save that Allah has revealed it in it (viz. Quran).”
Al-Mualla Ibn Khunais quotes on the authority of Imam Jafar al-Sadeq (a.s.), “There is not an issue in which two people disagree except that it has a basis in the Book of Allah – Mighty and Majestic be He – but intellects of men cannot reach to it.”
The above traditions show that one can get all the queries answered from the Holy Quran but for this, they must refer to those whom Allah the High has given the entire knowledge of His Book. Like Imam Jafar al-Sadeq (a.s.) said, “Indeed, I am the son of Allah’s Messenger (s.a.w.a.). I am most knowledgeable about the Book of Allah. In it is the (knowledge of) the beginning of creation and what will occur till the Day of Judgment. In it are the news of the sky and the news of the earth, news of paradise and news of hell, news of the past and the future. I know all these like I look at my palm. Surely, Allah – Mighty and Majestic be He – says, ‘In it is the explanation of all things’.”
To conclude this discussion, let us go through the amazing statements of Ameerul Momineen Ali Ibn Abi Talib (a.s.) in this regard:
“O People! Verily Allah – Blessed and High be He – sent to you the Messenger (s.a.w.a.) and revealed upon him (s.a.w.a.) the Book with the Truth. You are unlettered about the Book and the One Who has sent it down and about the Messenger (s.a.w.a.) and the One Who sent him when there was a cessation of (divine) messengers, the nations were in deep slumber, delighted with ignorance and facing the mischief, suffering from irrevocable collapse, deviated from the truth, adopting injustice and tyranny, busy destroying religion, in blaze of wars, when the leaves of the world’s gardens had turned yellow, its branches had become dry, its leaves had scattered, its fruits had turned arid and its water had gone down.
The symbols of guidance were wiped out and the signs of destruction had appeared. The world was frowning and it was grimacing in the face of its inhabitants. It was turning its back and not facing them. Its fruit was mischief. Its food was corpse. Its watchword was fear. Its cover was sword. You were fragmented and disunited in the worst possible manner. The eyes of its inhabitants had become blind. Its days had become dark. They severed their relations with their relatives and shed their blood. They buried their young girls from among their children in the sand. The comforts of life and the lowest levels of consolations of this world bypassed them. They neither had hope of any reward from Allah nor did they fear, by Allah, His punishment. The alive amongst them were blind and lowly while their dead were in hell-fire despairing of Allah’s Mercy.
Then he (s.a.w.a.) brought for them the script of what was in the first scripture and the verification of what was in front of them, the detail of the permissible from the doubt of the prohibited. Thus was the Quran. So you speak to it because it will never speak to you. I inform you about it that in it is the knowledge of the past and the knowledge of the future till the Day of Judgment, the decision of what is between you (of the disagreements) and the explanation of in which you differed. So, if you ask (me) from it, I will certainly teach you.”
On seeing the conditions prevalent in the world today, one can easily conclude that today we need the Holy Quran and the Ahle Bait (a.s.) more than ever!
 Al-Kaafi, vol. 1, p. 48, H. 1
 Al-Kaafi, vol. 1, p. 49, H. 6
 Al-Kaafi, vol. 1, p. 50, H. 8
 Al-Kaafi, vol. 1, p. 49, H. 7