How should you know who are true Christians, if following Christ was the way to be free from trouble? How should we discern the wheat from the chaff, if it were not for the winnowing of trial? How should we know whether men served Christ for His own sake or from selfish motives, if His service brought health and wealth with it as a matter of course? The winds of winter soon show us which of the trees are evergreen and which are not. The storms of affliction and care are useful in the same way. They discover whose faith is real and whose is nothing but profession and form.