The separation of church and state is necessary partly because if religion is good then the state shouldn't interfere with the religious vision or with the religious prophet.
Reinhold NiebuhrThe prophet himself stands under the judgment which he preaches. If he does not know that, he is a false prophet.
Reinhold NiebuhrWe take, and must continue to take, morally hazardous actions to preserve our civilization. We must exercise our power. But we ought neither to believe that a nation is capable of perfect disinterestedness in its exercise, nor become complacent about a particular degree of interest and passion which corrupt the justice by which the exercise of power is legitimatized.
Reinhold Niebuhr