I think it is time to give the answers Insha'Allaah.
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At-Tabarani recorded that Shutayr bin Shakal said, "I heard Ibn Mas`ud say,
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The greatest Ayah in the Book of Allah is: [اللَّهُ لاَ إِلَـهَ إِلاَّ هُوَ الْحَىُّ الْقَيُّومُ ] (Allah! None has the right to be worshipped but He, the Ever Living, the One Who sustains and protects all that exists) (2:255).
The most comprehensive Ayah in the Qur'an concerning good and evil is: [إِنَّ اللَّهَ يَأْمُرُ بِالْعَدْلِ وَالإْحْسَانِ] (Verily, Allah enjoins justice and Al-Ihsan) (16:90).
The Ayah in the Qur'an which brings the most relief is in Surat Az-Zumar: [قُلْ يعِبَادِىَ الَّذِينَ أَسْرَفُواْ عَلَى أَنفُسِهِمْ لاَ تَقْنَطُواْ مِن رَّحْمَةِ اللَّهِ] (Say: "O My servants who have transgressed against themselves! Despair not of the mercy of Allah.'') And the clearest Ayah in the Qur'an about reliance on Allah is: [وَمَن يَتَّقِ اللَّهَ يَجْعَل لَّهُ مَخْرَجاًوَيَرْزُقْهُ مِنْ حَيْثُ لاَ يَحْتَسِبُ] (And whosoever has Taqwa of Allah, He will make a way for him to get out (from every difficulty). And He will provide him from (sources) he never could imagine) (65:2-3).'
Masruq said to him; `You have spoken the truth.'''
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Quote:
| Extended Qu: The Ayah which, according to Ibn 'Abbas, brings the most hope |
`Abdur-Razzaq recorded that Ma`mar said that Ayyub said that Ibn `Abbas commented on what Ibrahim said, [وَلَـكِن لِّيَطْمَئِنَّ قَلْبِى] (but to be stronger in Faith),
"To me, there is no Ayah in the Qur'an that brings more hope than this Ayah.'' Ibn Abi Hatim recorded that Muhammad bin Al-Munkadir said that `Abdullah bin `Abbas met `Abdullah bin `Amr bin Al-`As and said to him, "Which Ayah in the Qur'an carries more hope for you'' Ibn `Amr said, [قُلْ يعِبَادِىَ الَّذِينَ أَسْرَفُواْ عَلَى أَنفُسِهِمْ لاَ تَقْنَطُواْ] (Say: "O `Ibadi (My servants) who have transgressed against themselves (by committing evil deeds and sins)! Despair not.) [39:53].
Ibn `Abbas said, "But I say that it is Allah's statement, [وَإِذْ قَالَ إِبْرَهِيمُ رَبِّ أَرِنِى كَيْفَ تُحْىِ الْمَوْتَى قَالَ أَوَلَمْ تُؤْمِن قَالَ بَلَى] (And (remember) when Ibrahim said, "My Lord! Show me how You give life to the dead.'' He (Allah) said: "Do you not believe'' He (Ibrahim) said: "Yes (I believe)...) Allah accepted Ibrahim's affirmation when he merely said, `Yes.' This Ayah refers to the doubts that attack the heart and the thoughts that Shaytan inspires.'' Al-Hakim also recorded this in Al-Mustadrak and said; "Its chain is Sahih but they did not record it.''
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These quotes have been taken from Tafseer Ibn Katheer.

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