21 For the upright will live in the land,
and the blameless will remain in it;
22 but the wicked will be cut off from the land,
and the unfaithful will be torn from it.
This is both an encouragement and a warning. For the upright and blameless: no matter how bleak current circumstances may be, there is an enduring hope for the future. For the wicked and unfaithful: no matter how well things may be going now, there is an inevitable end. There is perhaps no better place in scripture which captures this sentiment than Psalm 37, here is a small excerpt:
7 Be still before the Lord and wait patiently for him; do not fret when people succeed in their ways, when they carry out their wicked schemes. 8 Refrain from anger and turn from wrath do not fret—it leads only to evil. 9 For those who are evil will be destroyed, but those who hope in the Lord will inherit the land. 10 A little while, and the wicked will be no more; though you look for them, they will not be found. 11 But the meek will inherit the land and enjoy peace and prosperity.