So why are you using the passage in Matthew 25 to say that "sheep" can loose their salvation and become goats?
To show others that have mere belief which category they fall in before it is to late.
Because they truly believe they are sheep, and when they stand before Christ at the judgment seat. This is how they will be thinking, is how did I lose salvation, I believed in You.
Jesus will tell them because you denied Me by not helping others, I deny you. This is when they will realize they are part of the goats. I do not want it to get that far with them, I want to bring them out of false doctrine before it is to late for them.
These are some of the scriptures I use to prove some one in a saved state can lose salvation
James 1:12
Blessed is the man who
remains steadfast under trial, for when he has stood the test he will receive the crown of life, which God has promised to those who love him.
Matthew 24:10-13
And then
many will fall away and betray one another and hate one another. And many false prophets will arise and
lead many astray. And because lawlessness will be increased, the love of many will grow cold. But the one who endures to the end will be saved.
Matthew 10:22
And you will be hated by all for my name's sake. But the one
who endures to the end will be saved.
2 Peter 2:20-22
For if, after they have escaped the defilements of the world through the knowledge of our Lord and Savior Jesus Christ, they are again entangled in them and overcome, the last state has become worse for them than the first. For it would have been better for them never to have known the way of righteousness than after knowing it to turn back from the holy commandment delivered to them. What the true proverb says has happened to them: “The dog returns to its own vomit, and the sow, after washing herself, returns to wallow in the mire.”
Hebrews 12:1-3
Therefore, since we are surrounded by so great a cloud of witnesses, let us also lay aside every weight, and sin which clings so closely, and let us run with endurance the race that is set before us, looking to Jesus, the founder and perfecter of our faith, who for the joy that was set before him endured the cross, despising the shame, and is seated at the right hand of the throne of God. Consider him who endured from sinners such hostility against himself, so that you may not grow weary or fainthearted.
Hebrews 10:36
For you have need of endurance, so that when you have done the will of God you may receive what is promised.
Hebrews 6:4-6
For it is impossible, in the case of those who have once been enlightened, who have tasted the heavenly gift, and have shared in the Holy Spirit, and have tasted the goodness of the word of God and the powers of the age to come, and then have fallen away, to restore them again to repentance, since they are crucifying once again the Son of God to their own harm and holding him up to contempt.
Hebrews 3:12-14
Take care, brothers, lest there be in any of you an evil, unbelieving heart, leading you to
fall away from the living God. But exhort one another every day, as long as it is called “today,” that none of you may be hardened by the deceitfulness of sin. For we have come to share in Christ, if indeed we hold our original confidence firm to the end.
2 Timothy 4:2-8
Preach the word; be ready in season and out of season; reprove, rebuke, and exhort, with complete patience and teaching. For the time is coming when people will
not endure sound teaching, but having itching ears they will accumulate for themselves teachers to suit their own passions, and will
turn away from listening to the truth and wander off into myths. As for you, always be sober-minded, endure suffering, do the work of an evangelist, fulfill your ministry. For I am already being poured out as a drink offering, and the time of my departure has come.
1 Timothy 4:16
Keep a close watch on yourself and on the teaching.
Persist in this, for by so doing you will save both yourself and your hearers.
1 Corinthians 9:24-25
Do you not know that in a race all the runners run, but only one receives the prize? So run that you may obtain it. Every athlete exercises self-control in all things. They do it to receive a perishable wreath, but we an imperishable.
Romans 11:19-22
Then you will say, “Branches were broken off so that I might be grafted in.” That is true. They were broken off because of their unbelief, but you stand fast through faith. So do not become proud, but fear. For if God did not spare the natural branches, neither will he spare you. Note then the kindness and the severity of God: severity toward those who have fallen, but God's kindness to you,
provided you continue in his kindness. Otherwise you too will be cut off.
Mark 13:9-13
“But be on your guard. For they will deliver you over to councils, and you will be beaten in synagogues, and you will stand before governors and kings for my sake, to bear witness before them. And the gospel must first be proclaimed to all nations. And when they bring you to trial and deliver you over, do not be anxious beforehand what you are to say, but say whatever is given you in that hour, for it is not you who speak, but the Holy Spirit. And brother will deliver brother over to death, and the father his child, and children will rise against parents and have them put to death. And you will be hated by all for my name's sake. But the one who endures to the end will be saved.
Notice that none of these verses say once saved, always saved; They say instead to endure, persist, and remain steadfast in the gospel and the teachings of Jesus Christ to be saved.
And if you don't remain steadfast, it says that there will be those who don't and therefore fall away to false teachings and back to willful sin and therefore cast out, unless they repent and come back to the Lord.
Once again you can not fall away from something, if you were never a part of it.
