When the believer is in fellowship with God he is “filled with the Spirit” which means led by or controlled by the Holy Spirit.
When the believer is filled with the spirit, the Holy Spirit produces the “fruit of the spirit.” This fruit is expressed in Galatians 5:22-23. Rewards in Heaven are based on the accomplishments of the Holy Spirit through the believer during periods of fellowship/communion with God. God does the work of salvation and God does the work of living the Christian Life. The Christian Life is executed by the Holy Spirit in and through the believer while in fellowship (perpetual sin removed from your life and confessed — 1 John 1:9).