If believers are already saved, what is the point of placing them in front of the judgement seat of Christ?
To learn obedience through suffering, when we do not heed the voice of the Spirit of Christ in us. In this life disobedience of believers brings correction/chastening from God. While obedience in this life shall bring many blessings from God.
1 Thessalonians 5:19 (KJV) Quench not the Spirit.
Eph 4:30 And
grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.
Hebrews 5:8 (KJV) Though he were a Son, yet learned he obedience by the things which he suffered;
Heb 12:5 And ye have forgotten the exhortation which speaketh unto you as unto children,
My son, despise not thou the chastening of the Lord, nor faint when thou art rebuked of him:
Heb 12:6 For whom
the Lord loveth he chasteneth, and scourgeth every son whom he receiveth.
Heb 12:7 If ye endure chastening, God dealeth with you as with sons; for what son is he whom the father chasteneth not?
Luke 6:38 (KJV) Give, and it shall be given unto you; good measure, pressed down, and shaken together, and running over, shall men give into your bosom. For with the same measure that ye mete withal it shall be measured to you again.
Mark 10:30 (KJV) But
he shall receive an hundredfold now in this time, houses, and brethren, and sisters, and mothers, and children, and lands, with persecutions;
and in the world to come eternal life.
Lu 18:29 And he said unto them, Verily I say unto you, There is no man that hath left house, or parents, or brethren, or wife, or children, for the kingdom of God's sake,
Lu 18:30 Who shall not receive manifold more in this present time, and in the world to come life everlasting.