As for who the elect are:
Back to The Purpose of The Great Tribulation
Put on therefore, as the elect of God, holy and beloved, bowels of mercies, kindness, humbleness of mind, meekness, longsuffering; (Colossians 3:12)
Paul, a servant of God, and an apostle of Jesus Christ, according to the faith of God’s elect, and the acknowledging of the truth which is after godliness; (Titus 1:1)
The "elect" are all those whom God has called in Christ and they will be on the earth throughout the great tribulation. The days of the great tribulation will be shortened for their sake.
For the people of the Lord, the great tribulation will result in the spiritual fulfillment of the Day of Atonement, a fulfillment that will continue throughout the thousand-year Kingdom Age. It is the Day of Reconciliation to God (Leviticus 23:27).
The Day of Atonement was a Levitical ceremony that portrayed the forgiveness of the sins of Israel, and also the removal of sin from the camp (Leviticus 16:21). So it is true that physical suffering removes sin from the believer in Christ:
Forasmuch then as Christ hath suffered for us in the flesh, arm yourselves likewise with the same mind: for he that hath suffered in the flesh hath ceased from sin; (I Peter 4:1)
After the saints have been reconciled to Christ through means of the trials and dangers of the great tribulation, there will come a most glorious spiritual fulfillment of the feast of Tabernacles (Leviticus 23:34). God in Christ will enter the holy remnant in a manner similar to the indwelling of the Father’s Glory that the Lord Jesus experienced during His ministry on the earth (John 14:10,23), and always does experience.
The spiritual fulfillment of the feast of Tabernacles is our hope. Our participation in the Tabernacles experience will attain its climax when the Lord appears from Heaven and gives us bodies fashioned from eternal resurrection life. Such supreme glory is not possible until every vestige of sin and rebellion has been purged from us.
The twenty-fourth chapter of the Book of Matthew teaches that the elect of God will be on the earth throughout the period of trouble known as the great tribulation. The Lord’s elect will be gathered togetherafter the great tribulation (Matthew 24:31).
The elect are those who have been called of God to participate in His Kingdom. The elect are not distinguished as having been Jewish or Gentile by physical birth, for such a distinction is against the express teaching of the Scripture (Galatians 3:28). Rather, the elect are the branches of the cultivated olive tree (Romans 11:24).
God does nothing without a purpose. If He has determined that His elect will be on the earth throughout the great tribulation, He has a glorious result in mind. We know thatall things (including the great tribulation) "work together for good to them that love God, to them who are the called according to his purpose" (Romans 8:28).
We understand further that the promises of the thirty-fourth, the thirty-seventh, and the ninety-first Psalms, and of all the other passages of the Scriptures, will stand more firmly than a mountain of rock throughout the great tribulation. In fact, the day will come when the heaven and the earth pass away and human life as we know it is no more. But the Word of our God shall still be standing.
Not only will the biblical promises of protection stand true, but a positive good will result from the troubles of the great tribulation. The Church will be purged of its blemishes and brought to the measure of the stature of the fullness of Christ (Ephesians 4:13).
When we consider the "dry bones" of today, the deplorable condition of her who is to be "the choice one of her that bare her" (Song of Solomon 6:9), we can appreciate the need for an extraordinary intervention by the Lord on behalf of His Bride. She is unkempt, being clothed in filthy garments. The great tribulation will bring believers to the point of being willing to wash their garments and make them white in the blood of the Lamb.