Yes it is a gift of God, of the Spirit, and is ever rejected by the flesh unless or until God converts the sinner out of divine mercy. Our acceptance comes in after the fact God has set us free and enabled us to respond.
Indeed.
Chapter 11 [VI.]— That Some Men are Elected is of God's Mercy.
Many hear the word of
truth; but some
believe, while others contradict. Therefore, the former will to
believe; the latter do not will. Who does not
know this? Who can deny this? But since in some the will is prepared by the Lord, in others it is not prepared, we must assuredly be able to distinguish what comes from God's mercy, and what from His judgment. What
Israel sought for, says the apostle, he has not obtained, but the election has obtained it; and the rest were blinded, as it is written, God gave to them the spirit of compunction — eyes that they should not see, and ears that they should not hear, even to this day. And David said, Let their table be made a snare, a retribution, and a stumblingblock to them; let their eyes be darkened, that they may not see; and bow down their back always.
Romans 11:7 Here is mercy and judgment — mercy towards the election which has obtained the righteousness of
God, but judgment to the rest which have been blinded. And yet the former, because they willed,
believed; the latter, because they did not will
believed not. Therefore mercy and judgment were manifested in the very wills themselves. Certainly such an election is of
grace, not at all of merits. For he had before said, So, therefore, even at this present time, the remnant has been saved by the election of
grace. And if by
grace, now it is no more of works; otherwise
grace is no more
grace.
Romans 11:5 Therefore the election obtained what it obtained gratuitously; there preceded none of those things which they might first give, and it should be given to them again. He saved them for nothing. But to the rest who were blinded, as is there plainly declared, it was done in recompense. All the paths of the Lord are mercy and
truth. But His ways are unsearchable. Therefore the mercy by which He freely delivers, and the
truth by which He righteously judges, are equally unsearchable.
CHURCH FATHERS: On the Predestination of the Saints, Book I (Augustine)