Wisdom From Job

Bible study focused on the book of Job this week and I was reminded of the times I doubt God, His plan or do not trust His judgement. My lack of faith and trust, seems ridiculous when God reminds job of who he is, almost rhetorically, in response to Job's complaint/ questioning of his trial.
"The Lord said to Job: "Will the one who contends with the Almighty correct him? Let him who accuses God answer him!" The Job answered the Lord: "I am unworthy- how can I repay you? I put my hand over my mouth. I spoke once, but I have no answer- twice, but I will say no more." Then the Lord spoke to Job out of the storm: "Brace yourself like a man; I will question you, and you shall answer me. Would you discredit my justice? Would you condemn me to justify yourself? Do you have an arm like God's, and can your voice thunder like his? Then adorn yourself with glory and splendor, and clothe yourself in honor and majesty. Unleash the fury of your wrath, look at every proud man and bring him low, look at every proud man and humble him, crush the wicked where they stand. Bury them all in the dust together; shroud their faces in the grave. Then I myself will admit to you that your own right hand can save you.
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"Then Job replied to the Lord: "I know that you can do all things; no plan of yours can be thwarted. You ask, Who is this that obscures my counsel without knowledge? Surely I spoke of things I did not understand, things too wonderful for me to know. You said, Listen now, and I will speak; I will question you, and you shall answer me. My ears had heard of you but now my eyes have seen you. Therefore i despise myself and repent in the dust and ashes."

How many times have I questioned if God really knows all, sees all, and has an active roll in all things? And how many times do I give my opinion of how things "should be done"?
I should be at the very least grateful for life- which is given, to me, only by grace and mercy of the God. He is way beyond my understanding. Yeah, I really can not tell God a single thing that He does not already know. He is active and present in every second, causing the sun to rise and fall, and still he is concerned with me - this blows my mind. But may I never forget how BIG God is.