The Book of Hebrews refers to mature Christians as the ones "who by constant use have trained themselves to distinguish good from evil." What is biblical discernment, and why is discernment necessary for maintaining the purity of the gospel of Jesus Christ and preventing the church from drifting into apostasy? I'll talk it over with author and speaker Mike Gendron, founder of Proclaiming the Gospel, on Tuesday's JANET MEFFERD TODAY.