Reformed theology has often divided the work of Christ up into three different roles: prophet, priest, king. Here is John Calvin on the comfort which comes from understanding that Christ is king and that his kingship is permanent and heavenly, not temporary and earthly. This is from Calvin’s Institutes Book II, Chapter XV.
Thus it is that we may patiently pass through this life with its misery, hunger, cold, contempt, reproaches, and other troubles-content with this one thing: that our King will never leave us destitute, but will provide for our needs until, our warfare ended, we are called to triumph. Such is the nature of his rule, that he shares with us all that he has received from the Father. Now he arms and equips us with his power, adorns us with his beauty and magnificence, enriches us with his wealth. These benefits, then, give us the fruitful occasion to glory, and also provide us with confidence to struggle fearlessly against the devil, sin, and death. Finally cloth with his righteousness, we can valiantly rise above all the world’s reproaches; and just as he himself freely lavishes his gifts upon us, so may we, in return, bring forth fruit to his glory.
What a great passage about Christ’s preservation of his people, which allows us to fight to the end and give all the glory to Christ when the battle is finished.