In my zeal for God I persecuted the church. According to the righteousness stipulated in the law I was blameless.

For if that first covenant had been faultless, no one would have looked for a second one.

They were both righteous in the sight of God, following all the commandments and ordinances of the Lord blamelessly.

so that you may be blameless and pure, children of God without blemish though you live in a crooked and perverse society, in which you shine as lights in the world

so that your hearts are strengthened in holiness to be blameless before our God and Father at the coming of our Lord Jesus with all his saints.