Every Christian who struggles with depression struggles to keep their hope clear. There is nothing wrong with the object of their hope - Jesus Christ is not defective in any way whatsoever. But the view from the struggling Christian's heart of their objective hope could be obscured by disease and pain, the pressures of life, and by Satanic fiery darts shot against them... All discouragement and depression is related to the obscuring of our hope, and we need to get those clouds out of the way and fight like crazy to see clearly how precious Christ is.
John PiperGod created me—and you—to live with a single, all-embracing, all-transforming passion—namely, a passion to glorify God by enjoying and displaying his supreme excellence in all the spheres of life.
John PiperLife is not a straight line leading from one blessing to the next and then finally to heaven. Life is a winding and troubled road. Switchback after switchback. And the point of biblical stories like Joseph and Job and Esther and Ruth is to help us feel in our bones (not just know in our heads) that God is for us in all these strange turns. God is not just showing up after the trouble and cleaning it up. He is plotting the course and managing the troubles with far-reaching purposes for our good and for the glory of Jesus Christ.
John PiperWhat is sin? It is the glory of God not honored. The holiness of God not reverenced. The greatness of God not admired. The power of God not praised. The truth of God not sought. The wisdom of God not esteemed. The beauty of God not treasured. The goodness of God not savored. The faithfulness of God not trusted. The commandments of God not obeyed. The justice of God not respected. The wrath of God not feared. The grace of God not cherished. The presence of God not prized. The person of God not loved. That is sin.
John Piper