By using this simple approach, I believe Christians should be able to discern whether or not a group or a teacher is rooted and grounded in biblical theology. And they will be able to do that by using four mathematical operations (+, -, X, and /).

Watchman and Sheepdog with "boots on the ground" in the church and in culture
By using this simple approach, I believe Christians should be able to discern whether or not a group or a teacher is rooted and grounded in biblical theology. And they will be able to do that by using four mathematical operations (+, -, X, and /).