The redeemed have a higher authority…

The inherent independence of orthodoxy from the state is implied in its doctrines of God and redemption: Because redemption is the work whereby God himself atones for man’s sins, frees him from bondage to sin, and unites him with God, the redeemed Church and the redeemed individual have finally a higher authority than the state. While the Christian is to submit himself to the state (Romans 13), he and the Church must together repeat, at every attempt of the state to encroach on the rights of the Church, “We must obey God rather than men!” (Acts 5:29).

Calvin Beisner, from God in Three Persons, p. 141

The notion of separation of powers…

Another contribution of Christianity was the notion of separation of powers, based on the doctrine of the fall.

Charles Colson and Nancy Pearcey, from How Now Shall We Live?, p. 403

If ministering to the needs of the poor…

If inviting nonbelievers to worship matters, then so does preserving the freedom to worship. If ministering to the needs of the poor is a mandate, then changing the policies creating poverty is very much within that mandate. And if building shelter in developing countries is part and parcel of a Christian’s burden, so the destruction of the power of tyrants who oppress peoples around the globe.

Hugh Hewitt, from In, But Not Of, p. 20

The state should not be Christian…

The state should not be Christian, it should be just. It should be based on natural law, and not Scripture.

J. P. Moreland, from Assessing the Crisis of Our Age, a lecture given at the Apologetics Conference in Bend, OR, 2008