The entire Bible disproves Calvinism, but I will quote some Passages in answer to your question...
Unlike what Calvinism teaches, God takes no pleasure in the death of the wicked...
God himself pleads with us to repent and to remain remain faithful.
Luke 13:34 (WEB) 34
“Jerusalem, Jerusalem, that kills the prophets, and stones those who are sent to her! How often I wanted to gather your children together, like a hen gathers her own brood under her wings, and you refused!
Ezekiel 33:11-12 (NIV) 11
Say to them, ‘As surely as I live, declares the Sovereign Lord, I take no pleasure in the death of the wicked, but rather that they turn from their ways and live. Turn! Turn from your evil ways! Why will you die, people of Israel?’
12 “
Therefore, son of man, say to your people, ‘If someone who is righteous disobeys, that person’s former righteousness will count for nothing. And if someone who is wicked repents, that person’s former wickedness will not bring condemnation. The righteous person who sins will not be allowed to live even though they were formerly righteous.’"
God only changes your heart after you first repent and believe:
“
A new heart and a new spirit” is defined as regeneration – a new creation that is accessed only by a repentant faith.
Ezekiel 18 (NIV)
Bolding mine… 31 Rid yourselves of all the offenses you have committed,
and get a new heart and a new spirit.
Why will you die, people of Israel?
Potter and the Clay....
In
Jeremiah 18:2-11 (the Passage Paul used in Romans 9), God (the Potter) purposes to form into a vessel of honor only those who repent. We must repent first. . . .
Jeremiah 18:
2-11 (WEB) Bolding mine… 3
So I went down to the potter’s house, and I saw him working at the wheel. 4 But the pot he was shaping from the clay was marred in his hands; so the potter formed it into another pot, shaping it as seemed best to him. . . 11
Now therefore, speak to the men of Judah, and to the inhabitants of Jerusalem, saying, Yahweh says: Behold, I frame evil against you, and devise a device against you: return you now everyone from his evil way, and amend your ways and your doings.
How a person or nation reacts in God's (Potter's) hands, will determine how God chooses to form the clay. The fact that the clay is marred in God's hands is not God's doing.
Rather, the clay itself was marred, so God formed it for destruction.
God then summarizes in verse 11 - God is telling them the responsibility is on them to repent and God would reconsider the punishment He had intended against them.
Ezekiel 33:11-12 (NIV) 11
Say to them, ‘
As surely as I live, declares the Sovereign Lord, I take no pleasure in the death of the wicked,
but rather that they turn from their ways and live. Turn! Turn from your evil ways! Why will you die, people of Israel?’
12
“Therefore, son of man, say to your people, ‘If someone who is righteous disobeys, that person’s former righteousness will count for nothing. And if someone who is wicked repents, that person’s former wickedness will not bring condemnation. The righteous person who sins will not be allowed to live even though they were formerly righteous.’
In other words, God does not ordain good and evil, and all that occurs; rather, a Sovereign God righteously works out His will according to His omniscience and omnipotence. God’s sovereignty, glory and perfect will is being worked out in His creation in which every person is responsible for his own choices.
Jeremiah 18 is the bases for Paul’s reasoning of
Romans 9, which confirms this very thing regarding God’s Sovereignty. This reality clearly shows the indescribable depth of God’s Sovereignty, Wisdom and Foresight, which is unlike any human sovereignty in that a Sovereign God is able to work out His perfect will and plans while at the same time allowing mankind free will choices.
Same in the following verses:
2 Timothy 2 (WEB) Bolding mine… 19
However God’s firm foundation stands, having this seal, “The Lord knows those who are his,” and, “
Let everyone who names the name of the Lord depart from unrighteousness.”
20
Now in a large house there are not only vessels of gold and of silver, but also of wood and of clay. Some are for honor, and some for dishonor. 21
If anyone therefore cleanses himself from latter, he will be a vessel for honor, sanctified, and suitable for the master’s use, prepared for every good work.
God forms a vessel into something honorable and sanctified but only if they cleanse themselves.
So, God, as the Potter, will have mercy on whom He will have mercy. The Scriptures declare throughout the OT and NT that God chooses to have mercy on those who repent, and chooses to harden those who obstinately keep refusing His grace.
If God has to harden someone heart so they can no longer respond to His grace, then that means that, IF God had not hardened their hearts in judgment, they could have believed.
That is why Paul, at the end of Romans 9, sums up why God had punished Israel –
because they pursued righteousness not by faith but by works. This is actually how Scripture itself teaches us regarding God’s Sovereignty from Genesis to Revelation.
In this way, a Sovereign and Holy God remains an impartial and righteous judge who genuinely loves righteousness and genuinely hates sin, rather than a God of Calvinism who forms people for damnation and others for salvation, which would make God responsible for all the good and evil in the world. As we have seen, by one of Calvinist’s strongest proof texts, Romans 9, this is, thankfully, not the case.
God shows no partiality
1 Peter 1:15-20 (NIV)
15
But just as he who called you is holy, so be holy in all you do; 16
for it is written: “
Be holy, because I am holy.”
17
Since you call on a Father who judges each person’s work impartially,
live out your time as foreigners here in reverent fear.
Unlike what Calvinism teaches,
- God does not form or cause anyone to sin. Rather, each person sins by his own choice.
- And God always puts the responsibility on each person to remain faithful to receive life - OT and NT.
James 1:13-16 (NIV)
12
Blessed is the one who perseveres under trial because, having stood the test, that person will receive the crown of life that the Lord has promised to those who love him.
13
When tempted, no one should say, “God is tempting me.” For God cannot be tempted by evil, nor does he tempt anyone; 14
but each person is tempted when they are dragged away by their own evil desire and enticed. 15
Then, after desire has conceived, it gives birth to sin; and sin, when it is full-grown, gives birth to death.
16
Don’t be deceived, my dear brothers and sisters.
Galatians 6:7-9 (NIV)
7
Do not be deceived:
God cannot be mocked.
A man reaps what he sows. 8
Whoever sows to please their flesh, from the flesh will reap destruction; whoever sows to please the Spirit, from the Spirit will reap eternal life. 9
Let us not become weary in doing good, for at the proper time we will reap a harvest if we do not give up.
Hebrews 3:12-13 (NIV)
12
See to it, brothers and sisters,
that none of you has a sinful, unbelieving heart that turns away from the living God. 13 But encourage one another daily, as long as it is called “Today,” so that none of you may be hardened by sin’s deceitfulness.