You've made the sheep's safety the sheep's responsibility when their safety
is actually the shepherd's responsibility. And should the task prove too much
for the shepherd, then the sheep's safety becomes his Father's responsibility
because they together are a tag team, so to speak.
● John 10:28-29 . . No one can take them out of my hand-- my Father, who
has given them to me, is greater than all; and no one can take them out of
the Father's hand. I and my Father stand together.
BTW: "no one" of course includes the sheep seeing as how the Greek word
actually means not even one (man, woman or thing) i.e. none, nobody,
nothing.
The issue of apostasy has been debated ever since Augustine of Hippo developed his doctrine of predestination about A.D. 400. Romans 8:38-39 seems to say that it is impossible for a Christian to fail to persevere. Paul writes: “For I am convinced that neither death nor life… nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord.” We also read in John 10:27-29 that Jesus said, “My sheep listen to my voice… no one can snatch them out of my Father’s hand.” (Also, see EPH 1:11-14, 1JN 2:19, ACTS 17:26, PS 135:6 & PR 21:1.)
However,
there are numerous verses in the NT which indicate that it is possible for a believer intentionally or willfully to separate him/herself from Christ (cf. GL 5:1 & RV 12:9). The classic passage that teaches the possibility of apostasy is Hebrews 6:4-6: “It is impossible for those who have… shared in the Holy Spirit… if they fall away, to be brought back to repentance, because to their loss they are crucifying the Son of God all over again.” Another verse in this vein is Galatians 5:4: “You who are trying to be justified by law… have fallen away from grace.” (The reader should also see RM 11:22, 1CR 15:2, CL 1:22-23, 2THS 1:4-5, 2TM 2:12, HB 3:6&14, 10:35-36, JM 1:12, 2PT 1:10-11, 2:20, 1JN 2:24-25 and RV 2:10. These Scriptures are quoted at the end of this part.)
Some Christians say that the biblical exhortations to persevere do not imply the possibility of apostasy but this interpretation is problematic for three reasons:
First, the plain sense of many verses of Scripture including those listed in the preceding parentheses suggests that it is possible for a believer to commit apostasy, and saying that this understanding is false seems to make God tricky.
Second, God’s plan of salvation from the miserable consequences of choosing to reject Him makes sense only if people are morally accountable or free, and free will is meaningful only if a person can choose between essentially opposite options, as in Deuteronomy 30:19: “I set before you today life and death, blessings and curses.” This is the same choice that was set before Adam and Eve in the Garden of Eden (GN 2:16-17) and before that to Satan in heaven (LK 10:18).
I see no reason to think that this choice is not eternal, because it is this choice which creates: free will (faith in Christ or antichrist), moral responsibility (love the Lord or hate Him) and meaningful life (taste of heaven now and hope for eternal joy rather than misery now and ultimately hell). And 1 Corinthians 13:13 says “these three remain”.
Third, Jesus said “The truth will set you free” (JN 8:32), and “If the Son sets you free, you will be free indeed.” (JN 8:36) As a disciple of Christ I feel free, and I find every day fraught with significance as I fight on God’s side against evil in a war that has ultimate consequences for the destiny of my soul. Spiritual freedom is in Christ.
If Christians retain the same freedom they had as non-Christians to accept or reject Christ’s Lordship, then
the second most important truth to learn in life after the Gospel/kerygma is the “necessity” of persevering in accepting Christ as Lord and in learning God’s Word (LGW) until we die in order to achieve our God-given purpose in life: the fullness of Christ or spiritual maturity. [LGW signifies this truth.]