'Discernment is a skill. It is no an inherent ability like breathing or chewing but a skill like reading or public speaking that must be practiced and must be improved. There is not a person on earth who has been born with a full measure of discernment or who has all of the discernment he will ever need. There is not a person who has attained a level of expertise that allows him to move on and to leave discernment behind. Like the master musician who practices his skills more as his acclaim grows, a discerning person will see with ever-greater clarity his need to increase in discernment. He will want to sharpen and improve this skill throughout his life.'
Tim Challies, The Discipline of Spiritual Discernment, p.61.