An experience of renewal doesn't mean our work is over. The pull of the world to compromise never lets up, and we need to humbly but zealously hold each other accountable to the commands of God's word.
When God revives His people, they respond in grace-filled recommitment. They make the appropriate connections between their sins and the difficulties of their lives, and then commit to change, being distinct from the world by living in love.
Confession of sin is the result of honesty about who God is and who we are. When we remember God's perfections and power, we recognize the wickedness of our sin and seek salvation only through the mercy of God in Jesus Christ.
What could possibly be so serious, so destructive to God's people, that Nehemiah would call off rebuilding the wall until it was resolved? Greed, oppression, and indifference among the people of God had to be replaced by a unifying generosity before the work could continue.
The church today may have nice buildings, but some things in the church are broken. When God begins to revive his people, they see these broken "walls" and they start to care, wanting to see change that will glorify him.