When should a Christian leave his or her denomination? The late Presbyterian theologian John Gerstner, long time professor of church history at Pittsburgh Theological Seminary, looks at the question from many different, yet complementary angles, including: When a church ceases to be a church, when the church requires you to affirm what you do not believe and to affirm what you do not believe. Examples of concerns that have rocked the church would be such things as the ordination of women and practicing homosexuals. Gerstner offers clear and persuasive answers to this perennial conundrum.