If we want to know the greatness and glory of Jesus Christ we just have to look at His vocation. When everything else is said about His coming into the world, this is the full, final, supreme thing: He came to reveal the invisible God. That is the function of God's Son, and everything for us rests upon our appreciation of Jesus Christ. For us our knowledge of Christ governs everything in time and eternity. For the child of God, 'greatness' is a matter of the heart, and we are therefore brought into situations where we must know something much greater than we do know. That is why God brings His children into impossible situations - that they may learn how great Christ is. It is those people who have had the deepest and the greatest trials and difficulties who know how great is the Lord.