[T]he Bible [is not] like a jigsaw puzzle that guarantees all the pieces have been provided. It is rather more like a jigsaw puzzle whose Maker has guaranteed that all the pieces he has provided belong to the same puzzle, even though for various good reasons he has not given us all of them. ‘The secret things belong to the LORD,’ Moses tells us, ‘but the things revealed belong to us and to our children forever’ (Deut. 29:29 NIV). That means that we will always have gaps as we construct the puzzle; it means that clumsy players will try to force some pieces into slots where they do not belong and may be tempted to leave some pieces out because they cannot see where they fit in.

–D.A. Carson, A Call to Spiritual Reformation, Priorities from Paul and His Prayers

Psalm 139:6 TNIV
Such knowledge is too wonderful for me, too lofty for me to attain.