True community of marriage can move only from unity of spirit through the emotional into the physical. It can live, therefore, only in faithfulness, only and solely in steadfast, everlasting unity. This is possible only under the rulership of the Spirit. Only out of this can physical purity be desired. Only when the emotions are ruled by the Spirit can freeing and purification become reality.

- Eberhard Arnold On the Struggle of Young People in the Problem of Love