According to OSAS advocates, why does God withdraw the gift of perseverance from those on rocky soil (Matthew 13:20-21, Luke 8:13)?

>#### Gift of perseverance > >The Gift of perseverance is the doctrine of Augustine of Hippo that persevering in the faith is a gift given by God, but a person can never know if they have the gift. According to Augustine, without having the gift of perseverance a person is damned, even if he seems to have been elected by grace. Augustine himself also believed that Cyprian held a similar view about perseverance being a work of God, and thus foreshadowing the Augustinian view. **Some Calvinists argue that the Augustinian view foreshadows the Calvinist doctrine of perseverance of the saints**. > > https://en.wikipedia.org/wiki/Gift_of_perseverance > [Matthew 13:20-21 NASB] 20 The one sown with seed on the rocky places, this is the one who hears the word **and immediately receives it with joy**; 21 **yet he has no firm root in himself, but is only temporary**, and when affliction or persecution occurs because of the word, **immediately he falls away**. > [Luke 8:13 NASB] Those on the rocky soil are the ones who, when they hear, **receive the word with joy**; **and yet these do not have a firm root**; **they believe for a while**, **and in a time of temptation they fall away**. How do advocates of the doctrine of *eternal security*, also known as *once saved, always saved* or *the perseverance of the saints*, explain God’s apparent withdrawal of the gift of perseverance from the individual described in Matthew 13:20-21 and Luke 8:13? In these passages, it seems that God allows a person to be exposed to the gospel, to experience genuine initial joy and even a measure of faith, yet for some reason does not grant them the gift of perseverance (otherwise they would have persevered). In other words, God is permitting this "sheep" to fall away from His hand, or never put this "sheep" in His hand in the first place, but why? Why is God not giving the gift of perseverance to the individual in Matthew 13:20-21 and Luke 8:13?