having been filled with the fruit
of righteousness which comes through
Jesus Christ, to the glory and praise of God.
As those who are indwelled by Christ, as those in whom He abides, we are filled up, yes literally crammed full, with righteousness. Overpowering thought, isn't it? But that is the truth. This is our new self, our born-again self, our regenerated self, which in the likeness of God has been created in the righteousness and holiness of the truth (Ephesians 4:24).
This is why we can no longer practice sin, but will practice righteousness (I John 3:7-10). In other words, we just can't help but be who we are, and we are now the righteousness of God in Jesus Christ.
Yes, I know we don't always live up to this, but this is the work of salvation that God has begun in us; and it is our outworking of this righteousness that we have been filled with that brings glory and praise to God as we act more and more like Him.