"Make every effort to live in peace with all men and to be holy; without holiness no one will see the Lord. See to it that no one misses the grace of God..."
God is most clearly shown in holiness for He is Holy. If our lives do not point to the Lord, that is to the Holy One in our midst, who can see the invisible God? Jesus Christ, the image of the invisible God who lives in us through the Holy Spirit, is the one who makes us holy. To live holy is to live incarnationally as the salt and light of the earth.
And so we also see to it that no one misses the grace of God for unto us a new righteousness has been revealed. Because of Jesus Christ, all have free access to the throne of God. Those who resist grace do so because they do not recognize grace. Grace is irresistible save for the act of God himself which makes men have eyes but never seeing and ears but never understanding lest he turn and be healed. They perish because they refused to love the truth and so be saved.
So as we live holy as God is Holy, we continue to shine the light of the world that was brought forth from the virgin's womb and begotten of the Father through the Holy Spirit. It is this light which opens the eyes of men that the scales might fall off.