Stanley Hauerwas, in the closing lines to his Gifford Lectures:
Christians believe that God has given us all the time we need to address one challenge, one argument at a time. We can take our time to make our arguments because we know that our lives are not our own; thus it is possible for us to live without our living being no more than a hedge against death, that is, it is possible for us to live as wit-nesses. I have said that without witness, there is no argument. But it does not follow that arguments always accompany witness. Sometimes witnesses are all Christians have to offer, and sometimes witnesses are enough; for what could be more powerful than the discovery that human beings have been made part of God’s care of creation through the cross and resurrection of Jesus of Nazareth.