After Job had been through all he went through, and had been 'counselled' by his unhelpful friends, and had asked God a few searching questions, God responded by revealing something of His greatness and power and wisdom to Job (the last few chapters of the book of Job - 38-42 - are absolutely amazing!)
Job responded with the words, 'Surely I spoke of things I did not understand, things too wonderful for me to know'
(Job 42v3)
I've asked God a lot of questions over the past few years, and God hasn't answered in the way I expected but has shown me more of who He is. My response when I look at the bigness and wisdom of God has to be the same as Job's. 'Things too wonderful for me to know.'