‘Being filled with the fruits of righteousness, which are through Jesus Christ, unto the glory and praise of God.'
For the purpose of the good work of Christ within them was to fill them with the fruits of righteousness which resulted from their knowing Christ, so that their lives might be to the praise and glory of God. By their fruits they were to be known (Matthew 7:16; Matthew 7:20). In Jesus' own words in Matthew 5:16, they were to ‘let their lights shine before men that they might see their good works and glorify their Father Who is in Heaven' (compare Philippians 2:15).
These fruits of righteousness are ‘through Jesus Christ'. It is because He has wrought atonement and reconciliation for us, and is at work within us, that these fruits of righteousness will result. It is as we ‘abide in Him' in a continual response of faith that we will produce permanent fruit (John 15:4-5). The result will be that we will be ‘trees of righteousness, the planting of the Lord, that He might be glorified' (Isaiah 61:3), and will thus be producing ‘fruits of righteousness'.