1. Without knowledge of self there is no knowledge of God
b(a)Nearly all the wisdom we possess, that is to say, true and sound wisdom, consists of two parts: the knowledge of God and of ourselves.3 eBut, while joined by many bonds, bwhich one precedes and brings forth the other is not easy to discern. eIn the first place, no one can look upon himself without immediately turning his thoughts to the contemplation of God, in whom he “lives and moves” [Acts 17:28]. For, quite clearly, the mighty gifts with which we are endowed are hardly from ourselves; indeed, our very being is nothing but subsistence in the one God. Then, by these benefits shed like dew from heaven upon us, we are led as by rivulets to the spring itself. Indeed, our very poverty better discloses the infinitude of benefits reposing in God. The miserable ruin, into which the rebellion of the first man cast us, especially compels us to look upward. Thus, not only will we, in fasting and hungering, seek thence what we lack; but, in being aroused by fear, we shall learn humility.4 bFor, as a veritable world of miseries is to be found in mankind, e(b)and we are thereby despoiled of divine raiment, our shameful nakedness exposes a teeming horde of infamies. Each of us must, then, be so stung by the consciousness of his own unhappiness as to attain at least some knowledge of God. bThus, from the feeling of our own ignorance, vanity, poverty, infirmity, and—what is more—depravity and corruption, we recognize that the true light of wisdom, sound virtue, full abundance of every good, and purity of righteousness rest in the Lord alone. To this extent we are prompted by our own ills to contemplate the good things of God; and we cannot seriously aspire to him before we begin to become displeased with ourselves. For what man in all the world would not gladly remain as he is—what man does not remain as he is—so long as he does not know himself, that is, while content with his own gifts, and either ignorant or unmindful of his own misery? Accordingly, the knowledge of ourselves not only arouses us to seek God, but also, as it were, leads us by the hand to find him.

2. Without knowledge of God there is no knowledge of self
bAgain, it is certain that man never achieves a clear knowledge of himself5 unless he has first looked upon God’s face, and then descends from contemplating him to scrutinize himself.6 For we always seem to ourselves righteous and upright and wise and holy—this pride is innate in all of us—unless by clear proofs we stand convinced of our own unrighteousness, foulness, folly, and impurity. Moreover, we are not thus convinced if we look merely to ourselves and not also to the Lord, who is the sole standard by which this judgment must be measured. For, because all of us are inclined by nature to hypocrisy,7 a kind of empty image of righteousness in place of righteousness itself abundantly satisfies us. And because nothing appears within or around us that has not been contaminated by great immorality, what is a little less vile pleases us as a thing most pure—so long as we confine our minds within the limits of human corruption. Just so, an eye to which nothing is shown but black objects judges something dirty white or even rather darkly mottled to be whiteness itself. Indeed, we can discern still more clearly from the bodily senses how much we are deluded in estimating the powers of the soul. For if in broad daylight we either look down upon the ground or survey whatever meets our view round about, we seem to ourselves endowed with the strongest and keenest sight; yet when we look up to the sun and gaze straight at it, that power of sight which was particularly strong on earth is at once blunted and confused by a great brilliance, and thus we are compelled to admit that our keenness in looking upon things earthly is sheer dullness when it comes to the sun. So it happens in estimating our spiritual goods. As long as we do not look beyond the earth, being quite content with our own righteousness, wisdom, and virtue, we flatter ourselves most sweetly, and fancy ourselves all but demigods. Suppose we but once begin to raise our thoughts to God, and to ponder his nature, and how completely perfect are his righteousness, wisdom, and power—the straightedge to which we must be shaped. Then, what masquerading earlier as righteousness was pleasing in us will soon grow filthy in its consummate wickedness. What wonderfully impressed us under the name of wisdom will stink in its very foolishness. What wore the face of power will prove itself the most miserable weakness. That is, what in us seems perfection itself corresponds ill to the purity of God.
John Calvin, Institutes of the Christian Religion & 2, ed. John T. McNeill, trans. Ford Lewis Battles, vol. 1, The Library of Christian Classics (Louisville, KY: Westminster John Knox Press, 2011), 35–38.