***Yet “sheep” and “wolf” don’t seem to be unchangeable statuses when applied to humans. The call to “repent” would be meaningless if one couldn’t turn from sin and become a “sheep,” The call to “persevere” would be meaningless if one couldn’t turn from virtue and become a wolf.***
Actually, they are. In reality we are all dead and can only be rescused by God’s grace. Twice in Scripture God tells us that He will have mercy on who he will have mercy. What’s more he tells us he will have compassion who He will have compassion. We go on to read in Romans Chapter 9 that “It does not, therefore, depend on human desire or effort, but on God’s mercy.”
It’s not up to us. but Him.
More than twice, but not as perhaps you have seen it. Oh, where to start ? What do Moses and Saul/Paul have in common ? And Moses returned unto the Lord, and said, Oh, this people have sinned a great sin, and have made them gods of gold. Yet now, if thou wilt forgive their sin--; and if not, blot me, I pray thee, out of thy book which thou hast written. And he said, I will make all my goodness pass before thee, and I will proclaim the name of the Lord before thee; and will be gracious to whom I will be gracious, and will shew mercy on whom I will shew mercy. I say the truth in Christ, I lie not, my conscience also bearing me witness in the Holy Ghost, That I have great heaviness and continual sorrow in my heart. For I could wish that myself were accursed from Christ for my brethren, my kinsmen according to the flesh: Who are Israelites; to whom pertaineth the adoption, and the glory, and the covenants, and the giving of the law, and the service of God, and the promises; Whose are the fathers, and of whom as concerning the flesh Christ came, who is over all, God blessed for ever. Amen. It was said unto her, The elder shall serve the younger. As it is written, Jacob have I loved, but Esau have I hated. What shall we say then? Is there unrighteousness with God? God forbid. For he saith to Moses, I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. Even so have these also now not believed, that through your mercy they also may obtain mercy. For God hath concluded them all in unbelief, that he might have mercy upon all. O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out! For who hath known the mind of the Lord? or who hath been his counsellor? I exhort therefore, that, first of all, supplications, prayers, intercessions, and giving of thanks, be made for all men; For kings, and for all that are in authority; that we may lead a quiet and peaceable life in all godliness and honesty. For this is good and acceptable in the sight of God our Saviour; Who will have all men to be saved, and to come unto the knowledge of the truth. For there is one God, and one mediator between God and men, the man Christ Jesus; Who gave himself a ransom for all, to be testified in due time. Whereunto I am ordained a preacher, and an apostle, (I speak the truth in Christ, and lie not;) a teacher of the Gentiles in faith and verity. And he saith unto me, Seal not the sayings of the prophecy of this book: for the time is at hand. He that is unjust, let him be unjust still: and he which is filthy, let him be filthy still: and he that is righteous, let him be righteous still: and he that is holy, let him be holy still. And, behold, I come quickly; and my reward is with me, to give every man according as his work shall be. I am Alpha and Omega, the beginning and the end, the first and the last. Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city. For without are dogs, and sorcerers, and whoremongers, and murderers, and idolaters, and whosoever loveth and maketh a lie. I Jesus have sent mine angel to testify unto you these things in the churches. I am the root and the offspring of David, and the bright and morning star. And the Spirit and the bride say, Come. And let him that heareth say, Come. And let him that is athirst come. And whosoever will, let him take the water of life freely. Therefore thus saith the Lord God; Now will I bring again the captivity of Jacob, and have mercy upon the whole house of Israel, and will be jealous for my holy name; After that they have borne their shame, and all their trespasses whereby they have trespassed against me, when they dwelt safely in their land, and none made them afraid. When I have brought them again from the people, and gathered them out of their enemies' lands, and am sanctified in them in the sight of many nations; Then shall they know that I am the Lord their God, which caused them to be led into captivity among the heathen: but I have gathered them unto their own land, and have left none of them any more there. Neither will I hide my face any more from them: for I have poured out my spirit upon the house of Israel, saith the Lord God.
Everyone would act as if either he were saved no matter what he did, or damned no matter what he did. And these are the sins of Presumption and Despair. They are brought on by disbelieving in God's Word--- and that includes His imperative verbs.
Go to any Bible site with a keyword function, and enter "Gain eternal life". Or, in other translations, "What must I do to be saved?"