Institutes of the Christian Religion

by John Calvin

The believer finds within himself two principles: the one filling him with delight in recognizing the divine goodness, the other filling him with bitterness under a sense of his fallen state; the one leading him to recline on the promise of the Gospel, the other alarming him by the conviction of his iniquity; the one making him exult with the anticipation of life, the other making him tremble with the fear of death. This diversity is owing to imperfection of faith, since we are never so well in the course of the present life as to be entirely cured of the disease of distrust, and completely replenished and engrossed by faith. Hence those conflicts: the distrust cleaving to the remains of the flesh rising up to assail the faith enlisting in our hearts. But if in the believer's mind certainty is mingled with doubt, must we not always be carried back to the conclusion, that faith consists not of a sure and clear, but only of an obscure and confused, understanding of the divine will in regard to us? By no means. Though we are distracted by various thoughts, it does not follow that we are immediately divested of faith. Though we are agitated and carried to and fro by distrust, we are not immediately plunged into the abyss; though we are shaken, we are not therefore driven from our place. The invariable issue of the contest is, that faith in the long run surmounts the difficulties by which it was beset and seemed to be endangered.

Endurance and hope.