“Blessed are those who mourn, for they shall be comforted.”
Matthew 5:4
Grieve for unrighteousness, and you will be blessed, as God will be near to comfort you.
Many times this verse is used to comfort those who are grieving the loss of a recently departed loved one. However, the intent of this wisdom goes beyond the general aspect of mourning for death. Instead, it is a promise of God’s comforting presence with those who have a deep and sincere grief over unrighteousness, whether personal or within their shared experience.
This type of mourning takes place when one realizes their wayward actions are an affront to a holy God. This can result in personal repentance and a recommitment to do what’s right.
It is also a type of deep grief when one recognizes a state of unrighteousness among those around them, A godly heart is offended at the things that offend God. This can result in fervent prayer and intercession on the behalf of others.
If we are growing in our understanding of God and his desires for the ideals of his kingdom to be present here and now, then we are likely to also be demonstrating a sincere and passionate dissatisfaction with the unrighteousness that is exhibited within our experience each day. We grow to want what God wants, both for us and for others.
This holy grieving over lack from the ideal is spiritually healthy, and helps to keep our focus on what is truly of eternal importance. This is growing in holiness,
“Consecrate yourselves, therefore, and be holy, for I am the LORD your God.”
Leviticus 20:7
“As obedient children, do not be conformed to the passions of your former ignorance, but as he who called you is holy, you also be holy in all your conduct, since it is written, ‘You shall be holy, for I am holy.'”
1 Peter 1:14-16
The Core of the Bible 