You are Christian only so long as you constantly pose critical questions to the society you live in, so long as you emphasize the need of conversion both for yourself and for the world, so long as you in no way let yourself become established in the situation of the world, so long as you stay unsatisfied with the status quo and keep saying that a new world is yet to come. You are Christian only when you believe you have a role to play in the realization of the new kingdom, and when you urge everyone you meet with holy unrest to make haste so that the promise might soon be fulfilled. So long as you live as a Christian you keep looking for a new order, a new structure, a new life.
'Continue to work out your salvation...for it is God who works in you to will and to act according to his good purpose... so that you may become blameless and pure, children of God... shine(ing) like stars in the universe'
(Top quote courtesy of Mclaren who grabbed it from Van Eck and of course the excellent Henry Nouwen -if you ever face depression or love someone who does than I really recommend Nouwen's little book 'The Inner Voice of Love', not as a cure but as a companion (and we all know companions heal)