From John Piper, God Is the Gospel: Meditations on God’s Love As the Gift of Himself:
The ultimate good of the gospel is seeing and savoring the beauty and value of God. God’s wrath and our sin obstruct that vision and that pleasure. You can’t see and savor God as supremely satisfying while you are full of rebellion against Him and He is full of wrath against you. The removal of this wrath and this rebellion is what the gospel is for. The ultimate aim of the gospel is the display of God’s glory and the removal of every obstacle to our seeing it and savoring it as our highest treasure. “Behold Your God!” is the most gracious command and the best gift of the gospel. If we do not see Him and savor Him as our greatest fortune, we have not obeyed or believed the gospel.