Christians are constantly obliged to renew God’s demand

In reality, all solutions, all economic, political, and other achievements, are temporary. Christians cannot at any time or to any extent believe that they are complete and will endure. They are always contaminated by the sin that binds them, by the very environment in which they exist. Thus Christians are constantly obliged to renew God’s demand, to bring this order repeatedly into confrontation with an order that is moving constantly toward disorder. And because of God’s always-fresh demand on the world, Christians are placed in this way in a permanently revolutionary situation. Even when the institutions, laws, and reforms that they advocate come to pass, even if society is reorganized along the lines that they have advocated, they must remain in opposition and require yet more, because what God demands is infinite, as is his pardon. Thus Christians are called to continually question all that is termed progress, discoveries, facts, established results, reality, and so on. They cannot be satisfied at any time with all this toil, and, as a result, they must demand that it be surpassed and replaced. They exercise their judgement according to the Spirit---they do what is essentially revolutionary. If it is not so, it is because in some way Christians have betrayed their vocation in the world.

Jacques Ellul, Presence in the Modern World (p. 30)