Below is a brief meditation by Tullian Tchividjian in his book Do I Know God? on why Christians are the ones who should be celebrating newness louder than anybody.
When God saves us, we gain a new beginning, a new family, a new purpose, and a new power. Here is his section on family:
A New Family (Adoption)
“You are no longer foreigners and aliens, but fellow citizens with God’s people and members of God’s household,” Paul said. In other words, when God adopts us, we not only gain a Father, we gain a whole new family: the Church. The biblical word for “church” does not mean a building or institution, it means “the called out ones.” It refers to those whom God calls out of slavery and into sonship. The Church, in other words, is people: people adopted by God, people who know God as their heavenly Father. When God saves sinners he saves them into a whole new community — the “family of God.” As Frank Colquhoun wrote in his book Total Christianity, “When Christ saves a man he not only saves him from his sin, he saves him from his solitude.” He brings us into meaningful fellowship with others who will help us along the way in our relationship with God.
Read the rest here.