Blessed are they that mourn: for they shall be comforted. – Matthew 5:4

…to give unto them beauty for ashes, the oil of joy for mourning…  – Isaiah 61:3

Like his Lord, the Christian mourns for others. He mourns in Zion because of the deadness of the Christian church, its divisions, its errors, its carelessness towards the souls of sinners. He cries with Jeremiah, “How is the gold become dim! How is the much fine gold changed!” But, he mourns most of all for the unconverted. He sees their state of alienation from God, and knowing the danger of it, his heart shrinks within him, as with prophetic glance he sees what their end will be: when “there shall be wailing and gnashing of teeth.” His heart breaks for the sins and sorrows of others, and, like his Savior, he could weep over the cities that reject divine love; he could say like Moses that he was almost willing to have his name blotted out of the Book of Life if others might be saved: he feels such sorrow and heaviness of heart for his kinsmen according to the flesh who are strangers to Christ, that he has no rest in his death concerning them. Dear brethren, he that is quickened by the new life obtains an enlarged heritage of mourning; but, let it not be forgotten, he wins tenfold more joy as well; and, meanwhile, such weeping is in itself sweet-tears not too briny, and griefs not too bitter; such griefs we would wish to feel as long as we live, especially if the Lord Jesus alternates them with the fulfilling of that most excellent promise, “To appoint unto them that mourn in Zion, to give unto them beauty for ashes.” ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/1016.cfm