hi. As I understand Calvinism, it works like this: everyone is required to believe upon Jesus for salvation. Only The Elect are given the inner-workings of The Holy Spirit to bring about genuine repentance, conversion, and faith. It isn't a tragedy that so many end up in Hell; rather, it is a grand and glorious miracle that God extends His love and mercy to The Elect.
Here's the basics of Calvinism:
Total Depravity: Sin has affected all parts of man. The heart, emotions, will, mind, and body are all affected by sin. We are completely sinful. We are not as sinful as we could be, but we are completely affected by sin.
The doctrine of Total Depravity is derived from scriptures that reveal human character: Man’s heart is evil (Mark 7:21-23) and sick Jer. 17:9). Man is a slave of sin (Rom. 6:20). He does not seek for God (Rom. 3:10-12). He cannot understand spiritual things (1 Cor. 2:14). He is at enmity with God (Eph. 2:15). And, is by nature a child of wrath (Eph. 2:3). The Calvinist asks the question, "In light of the scriptures that declare man’s true nature as being utterly lost and incapable, how is it possible for anyone to choose or desire God?" The answer is, "He cannot. Therefore God must predestine."
Calvinism also maintains that because of our fallen nature we are born again not by our own will but God’s will (John 1:12-13); God grants that we believe (Phil. 1:29); faith is the work of God (John 6:28-29); God appoints people to believe (Acts 13:48); and God predestines (Eph. 1:1-11; Rom. 8:29; 9:9-23).
Unconditional Election: God does not base His election on anything He sees in the individual. He chooses the elect according to the kind intention of His will (Eph. 1:4-8; Rom. 9:11) without any consideration of merit within the individual. Nor does God look into the future to see who would pick Him. Also, as some are elected into salvation, others are not (Rom. 9:15, 21).
Limited Atonement: Jesus died only for the elect. Though Jesus’ sacrifice was sufficient for all, it was not efficacious for all. Jesus only bore the sins of the elect. Support for this position is drawn from such scriptures as Matt. 26:28 where Jesus died for ‘many'; John 10:11, 15 which say that Jesus died for the sheep (not the goats, per Matt. 25:32-33); John 17:9 where Jesus in prayer interceded for the ones given Him, not those of the entire world; Acts 20:28 and Eph. 5:25-27 which state that the Church was purchased by Christ, not all people; and Isaiah 53:12 which is a prophecy of Jesus’ crucifixion where he would bore the sins of many (not all).
Irresistible Grace: When God calls his elect into salvation, they cannot resist. God offers to all people the gospel message. This is called the external call. But to the elect, God extends an internal call and it cannot be resisted. This call is by the Holy Spirit who works in the hearts and minds of the elect to bring them to repentance and regeneration whereby they willingly and freely come to God. Some of the verses used in support of this teaching are Romans 9:16 where it says that "
it is not of him who wills nor of him who runs, but of God who has mercy"; Philippians 2:12-13 where God is said to be the one working salvation in the individual; John 6:28-29 where faith is declared to be the work of God; Acts 13:48 where God appoints people to believe; and John 1:12-13 where being born again is not by man’s will, but by God’s.
“All that the Father gives Me shall come to Me, and the one who comes to Me I will certainly not cast out," (John 6:37).
Perseverance of the Saints: You cannot lose your salvation. Because the Father has elected, the Son has redeemed, and the Holy Spirit has applied salvation, those thus saved are eternally secure. They are eternally secure in Christ. Some of the verses for this position are John 10:27-28 where Jesus said His sheep will never perish; John 6:47 where salvation is described as everlasting life; Romans 8:1 where it is said we have passed out of judgment; 1 Corinthians 10:13 where God promises to never let us be tempted beyond what we can handle; and Phil. 1:6 where God is the one being faithful to perfect us until the day of Jesus’ return.
While parts to all of Calvinism has been widely accepted among many Protestant denominations, at the Synod of Jerusalem in 1672, it was rejected by the Orthodox church as heretical.
Synod of Jerusalem (1672)
DECREE III.
We believe the most good God to have from eternity predestinated unto glory those whom He hath chosen, and to have consigned unto condemnation those whom He hath rejected; but not so that He would justify the one, and consign and condemn the other without cause. For that were contrary to the nature of God, who is the common Father of all, and no respecter of persons, and would have all men to be saved, and to come to the knowledge of the truth; {1 Timothy 2:4} but since He foreknew the one would make a right use of their free-will, and the other a wrong, He predestinated the one, or condemned the other. And we understand the use of free-will thus, that the Divine and illuminating grace, and which we call prevenient grace, being, as a light to those in darkness, by the Divine goodness imparted to all, to those that are willing to obey this — for it is of use only to the willing, not to the unwilling — and co-operate with it, in what it requires as necessary to salvation, there is consequently granted particular grace; which, co-operating with us, and enabling us, and making us perseverant in the love of God, that is to say, in performing those good things that God would have us to do, and which His prevenient grace admonishes us that we should do, justifies us, and makes us predestinated. But those who will not obey, and co-operate with grace; and, therefore, will not observe those things that God would have us perform, and that abuse in the service of Satan, the free-will, which they have received of God to perform voluntarily what is good, are consigned to eternal condemnation.
But to say, as the most wicked heretics do and as is contained in the Chapter answering hereto — that God, in predestinating, or condemning, had in no wise regard to the works of those predestinated, or condemned, we know to be profane and impious. For thus Scripture would be opposed to itself, since it promises the believer salvation through works, yet supposes God to be its sole author, by His sole illuminating grace, which He bestows without preceding works, to show to man the truth of divine things, and to teach him how he may co-operate therewith, if he will, and do what is good and acceptable, and so obtain salvation. He takes not away the power to will — to will to obey, or not obey him.
But than to affirm that the Divine Will is thus solely and without cause the author of their condemnation, what greater calumny can be fixed upon God? And what greater injury and blasphemy can be offered to the Most High? For that the Deity is not tempted with evils, {cf. James 1:13} and that He equally wills the salvation of all, since there is no respect of persons with Him, we do know; and that for those who through their own wicked choice, and their impenitent heart, have become vessels of dishonor, there is, as is just, decreed condemnation, we do confess. But of eternal punishment, of cruelty, of pitilessness, and of inhumanity, we never, never say God is the author, who tells us that there is joy in heaven over one sinner that repents. {Luke 15:7} Far be it from us, while we have our senses, thus to believe, or to think; and we do subject to an eternal anathema those who say and think such things, and esteem them to be worse than any infidels.