What, therefore, does the word "repentance" mean? Surely its meaning is like that of all other modes of speaking that describe God for us in human terms. For because our weakness does not attain to his exalted state, the description of him that is given to us must be accommodated to our capacity so that we may understand it. Now the mode of accommodation is for him to represent himself to us not as he is in himself, but as he seems to us. Although he is beyond all disturbance of mind, yet he testifies that he is angered, we ought not to imagine any emotion in him, but rather to consider that this expression has been taken from our own human experience; because God, whenever he is exercising judgment, exhibits the appearance of one kindled and angered. So we ought not to understand anything else under the word "repentance" than change of action, because men are wont by changing their action to testify that they are displeased with themselves. Therefore, since every change among men is a correction of what displeases them, but that correction arises out of repentance, then by the word "repentance" is meant the fact that God changes with respect to his actions. Meanwhile neither God's plan nor his will is reversed, nor his volition altered; but what he had from eternity foreseen, approved, and decreed, he pursues in uninterrupted tenor, however sudden the variation may appear in men's eyes.
Calvin, John. (1960). Institutes of the Christian Religion (1:17:13). The Westminster Press.
The Anthropomorphites, also, who imagined a corporeal God from the fact that Scripture often ascribes to him a mouth, ears, eyes, hands, and feet, are easily refuted. For who even of slight intelligence does not understand that, as nurses commonly do with infants, God is wont in a measure to "lisp" in speaking to us? Thus such forms of speaking do not so much express clearly what God is like as accommodate the knowledge of him to our slight capacity. To do this he must descend far beneath his loftiness.
Calvin, John. (1960). Institutes of the Christian Religion (1:13:1). The Westminster Press.