"A changed heart is the bright promise of the gospel. When the Bible talks about the gift of a new heart, it doesn't mean a heart that is immediately perfected, but a heart that is capable of being changed."
I started reading how people change today on the train to Plymouth. Interview with Paul Tripp & Timothy Lane. As they say, it's about how to apply old things in new and fresh ways.
Gospel-centred change is what we need in the church, change that comes from beholding the glory of God in the gospel of Jesus - the kind of life that can confess "I have seen you in the sanctuary and beheld your power and your glory." - entering into the presence of God, where the blood of Jesus is poured out and because of that blood.