Social justice is an application of the law of love to the sociopolitical sphere, and love is the motivating energy of the struggle for justice. The … - Reinhold Niebuhr

There are no simple congruities in life or history. The cult of happiness erroneously assumes them. It is possible to soften the incongruities of life endlessly by the scientific conquest of nature's caprices, and the social and political triumph over historic injustice. But all such strategies cannot finally overcome the fragmentary character of human existence. The final wisdom of life requires, not the annulment of incongruity but the achievement of serenity within and above it.

Nothing that is worth doing can be achieved in our lifetime; therefore we must be saved by hope. Nothing which is true or beautiful or good makes complete sense in any immediate context of history; therefore we must be saved by faith. Nothing we do, however virtuous, can be accomplished alone; therefore we must be saved by love. No virtuous act is quite as virtuous from the standpoint of our friend or foe as it is from our standpoint. Therefore we must be saved by the final form of love which is forgiveness.

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. There must be a realm of truth beyond political competence, that's why there must be a separation of churches, but if religion is bad and a bad religion is one that gives an ultimate sanctity to some particular cause. Then religion mustn't interfere with the state — so one of the basic Democratic principles as we know it in America is the separation of church and state. ... A church has the right to set its own standards within its community. I don't think it has a right to prohibit birth control or to enforce upon a secular society its conception of divorce and the indissolubility of the marriage tie.

While it is possible for intelligence to increase the range of benevolent impulse, and thus prompt a human being to consider the needs and rights of other than those to whom he is bound by organic and physical relationship, there are definite limits in the capacity of ordinary mortals which makes it impossible for them to grant to others what they claim for themselves.