The suffering of the utterly innocent and infinitely holy Son of God in the place of utterly undeserving sinners to bring us to everlasting joy is the greatest display of the glory of God’s grace that ever was, or ever could be.
This was the moment — Good Friday — for which everything in the universe was planned. In conceiving a universe in which to display the glory of His grace, God did not choose plan B. There could be no greater display of the glory of the grace of God than what happened at Calvary. Everything leading to it and everything flowing from it is explained by it, including all the suffering in the world.
Suffering and the Sovereignity of God, (2006, p.82)