Here is the order of genuine conversion. A sinner should “mourn” for his sinful state. He should have the spirit of heaviness (be laboring and heavy laden over his sinful heart; see Matt. 11:28). It is these converts who become trees of righteousness because they are the planting of the Lord; they are born of God (see John 1:13).
“The religion of Christ is the religion of joy. Christ came to take away our sins, to roll off our curse, to unbind our chains, to open our prisonhouse, to cancel our debt; in a word, to give us the oil of joy for mourning, the garment of praise for the spirit of heaviness. Is not this joy? Where can we find a joy so real, so deep, so pure, so lasting? There is every element of joy—deep, ecstatic, satisfying, sanctifying joy—in the gospel of Christ. The believer in Jesus is essentially a happy man. The child of God is, from necessity, a joyful man. His sins are forgiven, his soul is justified, his person is adopted, his trials are blessings, his conflicts are victories, his death is immortality, his future is a heaven of inconceivable, unthought-of, untold, and endless blessedness. With such a God, such a Saviour, and such a hope, is he not, ought he not, to be a joyful man?” Octavius Winslow
Isaiah 61:3 To console those who mourn in Zion,
To give them beauty for ashes,
The oil of joy for mourning,
The garment of praise for the spirit of heaviness;
That they may be called trees of righteousness,
The planting of the Lord, that He may be glorified.”