He has made everything beautiful in its time. He has also set eternity in the human heart; yet no one can fathom what God has done from beginning to end.
(Ecclesiastes 3:11)

God gives us His Word.  He gives us nature.  He gives us the Holy Spirit.  He gives us life.  He gives us miracles.  But no matter how many clues, how many books in the Bible, how many helps, it just isn't possible for us to grasp the enormity of God's power and wisdom.  I try to not get wrapped up in understanding all of the details.  The most important lesson is trusting God at His word and knowing that all of His promises will be fulfilled.  The "how" really doesn't matter.