I think if you are going to quote Calvin you should do more research into his thought first.

17. But it will be said that this differs widely from the experience of believers, who, in recognizing the grace of God toward them, not only feel disquietude (this often happens), but sometimes tremble, overcome with terror,29 286286 92 292 As to the imperfection, strengthening, and increase of faith, see Book 4. chap. 4 sec. 7, 8.
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so violent are the temptations which assail their minds. This scarcely seems consistent with certainty of faith. It is necessary to solve this difficulty, in order to maintain the doctrine above laid down. When we say that faith must be certain and secure, we certainly speak not of an assurance which is never affected by doubt, nor a security which anxiety never assails; we rather maintain that believers have a perpetual struggle with their own distrust, and are thus far from thinking that their consciences possess a placid quiet, uninterrupted by perturbation. On the other hand, whatever be the mode in which they are assailed, we deny that they fall off and abandon that sure confidence which they have formed in the mercy of God. Scripture does not set before us a brighter or more memorable example of faith than in David, especially if regard be had to the constant tenor of his life. And yet how far his mind was from being always at peace is declared by innumerable complaints, of which it will be sufficient to select a few. When he rebukes the turbulent movements of his soul, what else is it but a censure of his unbelief? “Why art thou cast down, my soul? and why art thou disquieted in me? hope thou in God,” (Psalm 42:6). His alarm was undoubtedly a manifest sign of distrust, as if he thought that the Lord had forsaken him. In another passage we have a fuller confession: “I said in my haste, I am cut off from before thine eyes,” (Psalm 31:22). In another passage, in anxious and wretched perplexity, he debates with himself, nay, raises a question as to the nature of God: “Has God forgotten to be gracious? has he in anger shut up his tender mercies?” (Psalm 77:9). What follows is still harsher: “I said this is my infirmity; but I will remember the years of the right hand of the Most High.”29 287287 93 293 Calvin’s Latin translation of the passage is, “Atque dixi, occidere meum est; mutationes dexteræ excelsi.”—The French is, “J’ay dit, Il me faut mourir. Voicy un changement de la main de Dieu;”—I said I must die. Behold a change in the hand of God.
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As if desperate, he adjudges himself to destruction.29 288288 94 294 See Calv adv. Pighiium, near the commencement.
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He not only confesses that he is agitated by doubt, but as if he had fallen in the contest, leaves himself nothing in reserve,—God having deserted him, and made the hand which was wont to help him the instrument of his destruction. Wherefore, after having been tossed among tumultuous waves, it is not without reason he exhorts his soul to return to her quiet rest (Psalm 116:7). And yet (what is strange) amid those commotions, faith sustains the believer’s heart, and truly acts the part of the palm tree, which supports any weights laid upon it, and rises above them; thus David, when he seemed to be overwhelmed, ceased not by urging himself forward to ascend to God. But he who anxiously contending with his own infirmity has recourse to faith, is already in a great measure victorious. This we may infer from the following passage, and others similar to it: “Wait on the Lord: be of good courage, and he shall strengthen thine heart: wait, I say, on the Lord,” (Psalm 27:14). He accuses himself of timidity, and repeating the same thing twice, confesses that he is ever and anon exposed to agitation. Still he is not only dissatisfied with himself for so feeling, but earnestly labors to correct it. Were we to take a nearer view of his case, and compare it with that of Ahaz, we should find a great difference between them. Isaiah is sent to relieve the anxiety of an impious and hypocritical king, and addresses him in these terms: “Take heed, and be quiet; fear not,” &c. (Isaiah 7:4). How did Ahab act? As has already been said, his heart was shaken as a tree is shaken by the wind: though he heard the promise, he ceased not to tremble. This, therefore, is the proper hire and punishment of unbelief, so to tremble as in the day of trial to turn away from God, who gives access to himself only by faith. On the other hand, believers, though weighed down and almost overwhelmed with the burden of temptation, constantly rise up, though not without toil and difficulty; hence, feeling conscious of their own weakness, they pray with the Prophet, “Take not the word of truth utterly out of my mouths” (Psalm 119:43). By these words, we are taught that they at times become dumb, as if their faith were overthrown, and yet that they do not withdraw or turn their backs, but persevere in the contest, and by prayer stimulate their sluggishness, so as not to fall into stupor by giving way to it. (See Calv. in Psalm 88:16).
18. To make this intelligible, we must return to the distinction between flesh and spirit, to which we have already adverted, and which here becomes most apparent. 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.