On Questioning God

Question: Samiya, does the Quran prohibits questioning God? Do you think we can avoid questioning when praying? 

Answer: No, rather it exhorts us to think deeply. 

[3:191-192 Translator: Sahih International] Indeed, in the creation of the heavens and the earth and the alternation of the night and the day are signs for those of understanding. Who remember Allah while standing or sitting or [lying] on their sides and give thought to the creation of the heavens and the earth, [saying], "Our Lord, You did not create this aimlessly; exalted are You [above such a thing]; then protect us from the punishment of the Fire. 

Prophet Abraham's faith is greatly praised in the Quran. Consider the following verses about him: 

[2:260 Translator: Pickthall] And when Abraham said (unto his Lord): My Lord! Show me how Thou givest life to the dead, He said: Dost thou not believe? Abraham said: Yea, but (I ask) in order that my heart may be at ease. (His Lord) said: Take four of the birds and cause them to incline unto thee, then place a part of them on each hill, then call them, they will come to thee in haste, and know that Allah is Mighty, Wise. 

[6:74-78 Translator: Pickthall] (Remember) when Abraham said unto his father Azar: Takest thou idols for gods? Lo! I see thee and thy folk in error manifest. Thus did We show Abraham the kingdom of the heavens and the earth that he might be of those possessing certainty: When the night grew dark upon him he beheld a star . He said: This is my Lord. But when it set, he said: I love not things that set. And when he saw the moon uprising, he exclaimed: This is my Lord. But when it set, he said: Unless my Lord guide me, I surely shall become one of the folk who are astray. And when he saw the sun uprising, he cried: This is my Lord! This is greater! And when it set he exclaimed: O my people! Lo! I am free from all that ye associate (with Him).

PS: in 6:76, the word that's translated as star I think should be translated as planet.  

And I think the following verses partially address the question JM hesitates to ask: 

[33:72-73  Translator: Pickthall] Lo! We offered the trust unto the heavens and the earth and the hills, but they shrank from bearing it and were afraid of it. And man assumed it. Lo! he hath proved a tyrant and a fool. So Allah punisheth hypocritical men and hypocritical women, and idolatrous men and idolatrous women. But Allah pardoneth believing men and believing women, and Allah is ever Forgiving, Merciful.