The two great features of Protestant theology are its doctrines of justification by faith and the law as the rule of life. This is a synthesis of New Testament grace and Old Testament ethics. With this synthesis, Protestants have solved the problem of finding a gracious God, but they have not solved the problem of finding gracious neighbors. They can fellowship with God because he is gracious; but they find it difficult to fellowship with one another, because they are not so gracious.
... Robert D. Brinsmead