It is possible . . . to turn [the spiritual disciplines] into another set of soul-killing laws. Law-bound Disciplines breathe death.

Jesus teaches that we must go beyond the righteousness of the scribes and the Pharisees (Matt. 5:20). Yet we need to see that their righteousness was no small thing. They were committed to following God in a way that many of us are not prepared to do. One factor, however, was always central to their righteousness: externalism. Their righteousness consisted in control over externals, often including the manipulation of others. The extent to which we have gone beyond the righteousness of the scribes and the Pharisees is seen in how much our lives demonstrate the internal work of God upon the heart. To be sure, this will have external results, but the work will be internal.

Richard J. Foster, The Celebration of Discipline