[Discernment is] a mental sense of smell that helps you notice when “something smells fishy”…How can you sharpen this mental sense of smell? How can you develop discernment? First, you need to have a spirit of obedience to Jesus Christ. If your spirit is in rebellion, your nose will be in rebellion too. Second, you need to study the Word of God and other Christian literature. We’re talking about a mental, not physical, sense of smell. In order to develop it you have to use your mind. Third, you need to practice smelling. Smell everything. Your power of discernment is like a muscle. Use it or lose it. Fourth, you need to be accountable to other believers in a healthy Christian fellowship. If you try to learn to smell by yourself, your mental sense of smell will be eccentric. You’ll be like someone who takes a deep whiff of dung and says, “Ah, roses!”