In love, Paul uses the strongest possible language to convince the churches in Galatia that when a gospel of Jesus plus anything else is preached, it is not the gospel at all. Any revision of the gospel leads to its reversal. If the true gospel is so crucial and each generation has been tempted to veer off and add things to it, how can we ensure that the gospel we believe is actually true? Why does it matter for us to be uncompromising about the gospel?