Predestination is the othe way that Christ warned us about that makes those who enter that way thieves and robbers.
We are predestined, by the choice at the cross, that was given to all men by the word of God.
Deuteronomy 30:19
This day I call heaven and earth as witnesses against you that I have set before you life and death, blessings and curses. Now choose life, so that you and your children may live20 and that you may love the LORD your God, listen to his voice, and hold fast to him. For the LORD is your life, and he will give you many years in the land he swore to give to your fathers, Abraham, Isaac and Jacob.
Those who believe are predestined to eternal life, those who do not are predestimned to condemnation.
The natural branches was not cut out because they were not elected or chosen, they were cut out for unbelief.
Romans 11:
19You will say then, "Branches were broken off so that I could be grafted in." 20Granted. But they were broken off because of unbelief, and you stand by faith. Do not be arrogant, but be afraid. 21For if God did not spare the natural branches, he will not spare you either.
22Consider therefore the kindness and sternness of God: sternness to those who fell, but kindness to you, provided that you continue in his kindness. Otherwise, you also will be cut off.
But praise be to God
23And if they do not persist in unbelief, they will be grafted in, for God is able to graft them in again.
Belief in Jesus is the true gate and Jesus is the key. When you enter faith without deeds is dead. You are saved not by what you have done, but what Jesus has done for you on the cross, because your debt is still payed by Jesus at the cross. Jesus has saved you from your debt by paying it Himself.
1 Peter 1:13
Be Holy
13Therefore, prepare your minds for action; be self-controlled; set your hope fully on the grace to be given you when Jesus Christ is revealed. 14As obedient children, do not conform to the evil desires you had when you lived in ignorance. 15But just as he who called you is holy, so be holy in all you do; 16for it is written: "Be holy, because I am holy."[Lev. 11:44,45; 19:2; 20:7]
17Since you call on a Father who judges each man's work impartially, live your lives as strangers here in reverent fear. 18For you know that it was not with perishable things such as silver or gold that you were redeemed from the empty way of life handed down to you from your forefathers, 19but with the precious blood of Christ, a lamb without blemish or defect. 20He was chosen before the creation of the world, but was revealed in these last times for your sake. 21Through him you believe in God, who raised him from the dead and glorified him, and so your faith and hope are in God.
22Now that you have purified yourselves by obeying the truth so that you have sincere love for your brothers, love one another deeply, from the heart.[Some early manuscripts from a pure heart] 23For you have been born again, not of perishable seed, but of imperishable, through the living and enduring word of God. 24For,
"All men are like grass,
and all their glory is like the flowers of the field;
the grass withers and the flowers fall,
25but the word of the Lord stands forever."[Isaiah 40:6-8] And this is the word that was preached to you.
Romans 16
25Now to him who is able to establish you by my gospel and the proclamation of Jesus Christ, according to the revelation of the mystery hidden for long ages past, 26but now revealed and made known through the prophetic writings by the command of the eternal God, so that all nations might believe and obey him— 27to the only wise God be glory forever through Jesus Christ! Amen.