Return to me and I will return to you

"The Papists allege this passage in defense of free-will; but it is a most puerile sophistry. They say that the turning of God to men is the same as their turning to him, as though God promised the grace of his Spirit as a help, when men anticipate him. They imagine then that free-will precedes, and then that the help of the Spirit follows. But this is very gross and absurd. The Prophet indeed means that God would return to the Jews; for he shows that God would in every respect be a father to them, when they showed themselves to be dutiful and respectful children. We must therefore remember that God does not here promise the aid of his Spirit to assist free-will, and to help the efforts of man, as these foolish and senseless teachers imagine, but that he promises to return to the Jews to bless them. Hence the return of God here is nothing else than the prosperity which they desired; as though he had said -- 'Fear me from the heart, and ye shall not labor under hunger and thirst; for I shall satisfy you, as neither your fields nor your vines shall hereafter disappoint your hopes. Ye shall find me most bountiful, when ye deal with me in a faithful manner.' This is the meaning.We must further bear in mind, that, according to the common usage of Scripture, whenever God exhorts us to repentance, he does not regard what our capacity is, but demands what is justly his right. Hence the Papists adopt what is absurd when they deduce the power of free-will from the command or exhortation to repent: God, they say, would not have commanded what is not in our power to do. It is a foolish and most puerile mode of reasoning; for if everything which God requires were in our power, the grace of the Holy Spirit would be superfluous; it would not only be as they say a waiting-mind, but it would be wholly unnecessary; but if men need the aid of the Spirit, it follows that they cannot do what God requires of them. But it seems strange that God should bid men to do more than what they can. It seems so indeed, I allow, when we form our judgment according to the common perception of the flesh; but when we understand these truths -- that the law works wrath -- that it increases sin -- that it was given that transgression might be made more evident, then the false notion -- that God requires nothing but what men can perform, comes to nothing. But it is enough for us to know, that God in exhorting us to repentance requires nothing but what nature dictates ought to be done by us. Since it is so, however short we are in the performance, it is not right to charge God with too much strictness, that he demands what is beyond our power." - John Calvin, Commentary on Zechariah


We are God's creatures and God has the right to command whatever he so pleases for us to do though we cannot attain to it.