But before I consider these individually, let me point you to this thought, that such a disposition, facing the inevitable sorrows, evils, and toilsome tasks of life with glad and courageous buoyancy, is a Christian duty, and is a temper not merely to be longed for, but consciously and definitely to be striven after. We have a great deal more in our power, in the regulation of moods and tempers and dispositions, than we often are willing to acknowledge to ourselves. Our 'low' times--when we fret and are dull, and all things seem wrapped in gloom, and we are ready to sit down and bewail ourselves, like Job on his dunghill--are often quite as much the results of our own imperfect Christianity as the response of our feelings to external circumstances. It is by no means an unnecessary reminder for us, who have heavy tasks set us, which often seem too heavy, and are surrounded, as we all are, with crowding temptations to be bitter and melancholy and sad, that Christ commands us to be, and therefore we ought to be, 'of good cheer.' Another observation may be made as preliminary, and that is that Jesus Christ never tells people to cheer up without giving them reason to do so. We shall see presently that in all cases where the words occur they are immediately followed by words or deeds of His which hold forth something on which, if the hearer's faith lay hold, darkness and gloom will fly like morning mists before the rising sun. The world comes to us and says, in the midst of our sorrows and our difficulties, 'Be of good cheer,' and says it in vain, and generally only rubs salt into the sore by saying it. Jesus Christ never thus vainly preaches the duty of encouraging ourselves without giving us ample reasons for the cheerfulness which He enjoins. With these two remarks to begin with--that we ought to make it a part of our Christian discipline of ourselves to seek to cultivate a continuous and equable temperament of calm, courageous good cheer; and that Jesus Christ never commands such a temper without showing cause for our obedience--let us turn for a few moments to the various instances in which this expression falls from His lips. I. Now the first of them is this of my text, and from it we learn this truth, that Christ's first contribution to our temper of equable, courageous cheerfulness is the assurance that all our sins are forgiven.