Unconditional Election

Unconditional Election:

When I think of a subject that can get you in trouble, two things come to mind... Trust your wife with your credit card and car keys simultaneously, and speak openly about Unconditional Election.
When Calvin wrote about Election and double predestination he called it a "dreadful decree" in these words:

"“Again I ask: whence does it happen that Adam’s fall irremediably involved so many peoples, together with their infant offspring, in eternal death unless because it so pleased God? The decree is dreadful indeed, I confess. Yet no one can deny that God foreknew what end man was to have before he created him, and consequently foreknew because he so ordained by his decree. And it ought not to seem absurd for me to say that God not only foresaw the fall of the first man, and in him the ruin of his descendants, but also meted it out in accordance with his own decision.”" (John Calvin, Institutes of Christian Religion, Book 3, Chapter 23, Paragraph 7)

But why do we believe such a thing if it is true? Unconditional Election has two sides: Election and Reprobation. Election is the choosing of the elect, and reprobation is passing over (or leaving) individuals in their sin. He calls the system dreadful because of the leaving... No one minds the Election of individuals, but the leaving some behind is the problem. So all I'm going to do is post some verses to see if we can make some sense out of this...

Psa 65:4  Blessed is the man whom thou choosest, and causest to approach unto thee, that he may dwell in thy courts: we shall be satisfied with the goodness of thy house, even of thy holy temple.
Mat 24:24  For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
Joh 6:37  All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.
Joh 15:16  Ye have not chosen me, but I have chosen you, and ordained you, that ye should go and bring forth fruit, and that your fruit should remain: that whatsoever ye shall ask of the Father in my name, he may give it you.
Act 13:48  And when the Gentiles heard this, they were glad, and glorified the word of the Lord: and as many as were ordained to eternal life believed.
Rom 8:28-30  And we know that all things work together for good to them that love God, to them who are the called according to his purpose. For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren. Moreover whom he did predestinate, them he also called: and whom he called, them he also justified: and whom he justified, them he also glorified.
Rom 9:10-24  And not only this; but when Rebecca also had conceived by one, even by our father Isaac; (For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth;) 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. So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy. For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth. Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth. Thou wilt say then unto me, Why doth he yet find fault? For who hath resisted his will? Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus? Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour? What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction: And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory, Even us, whom he hath called, not of the Jews only, but also of the Gentiles?
Rom 11:5-7  Even so then at this present time also there is a remnant according to the election of grace. And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work. What then? Israel hath not obtained that which he seeketh for; but the election hath obtained it, and the rest were blinded.
Eph 1:3-6  Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly places in Christ: According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love: Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will, To the praise of the glory of his grace, wherein he hath made us accepted in the beloved.
Eph 1:11-12  In whom also we have obtained an inheritance, being predestinated according to the purpose of him who worketh all things after the counsel of his own will: That we should be to the praise of his glory, who first trusted in Christ.
1Th 1:4 Knowing, brethren beloved, your election of God.
1Th 5:9 For God hath not appointed us to wrath, but to obtain salvation by our Lord Jesus Christ,
2Th 2:13-14 But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth: Whereunto he called you by our gospel, to the obtaining of the glory of our Lord Jesus Christ.
D)    Individuals to condemnation
Exo 4:21  And the LORD said unto Moses, When thou goest to return into Egypt, see that thou do all those wonders before Pharaoh, which I have put in thine hand: but I will harden his heart, that he shall not let the people go.
Rom 9:13  As it is written, Jacob have I loved, but Esau have I hated.
Rom 9:17-18  For the scripture saith unto Pharaoh, Even for this same purpose have I raised thee up, that I might shew my power in thee, and that my name might be declared throughout all the earth. Therefore hath he mercy on whom he will have mercy, and whom he will he hardeneth.
Rom 9:21-22  Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour? What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction:
1Pe 2:8  And a stone of stumbling, and a rock of offence, even to them which stumble at the word, being disobedient: whereunto also they were appointed.

Source: https://www.monergism.com/thethreshold/articles/onsite/gracelist.html