Romans 11:33-34 English Standard Version (ESV)
33 Oh, the depth of the riches and wisdom and knowledge of God! How unsearchable are his judgments and how inscrutable his ways!
34 “For who has known the mind of the Lord,
or who has been his counselor?”
Job 5:9New English Translation (NET Bible)
9 He does great and unsearchable things,
marvelous things without number;
But we'll understand it better by and by.
By and By - Selah