There is also outward peace. Yet it is an external providential help, not a necessity for the inward life. Thus the apostolic good wish contains the highest and best things that humble and reverent Christian feeling can expect from one who wishes it well.
The highest thing is grace. It opens for the condemned sinner an entrance to the merciful God and Father, and opens for him the treasures of His boundless love. The best thing is peace. It is established when, in the struggle between light and darkness at the inward center of personal life, the advantage remains with the light. Then the conscience's troubling anxieties subside. The heavy feeling of answerless sinfulness and condemnation finds a trustworthy outcome.
For the Christian, consolation in sorrow and inspiration for courage in his unavoidable struggle lie in this: grace is always with him, and the promise of peace belongs to him. God the Father and the Lord Jesus Christ stand as surety for this, unfailing in word and deed.
Where grace is, there is peace, although the Christian does not always feel it in its full strength. He remains in struggle with sin, with dark powers, and with outward obstacles to his good undertakings.
One may say that holiness and faith, which have been mentioned, correspond to grace and peace. Grace is the source of holiness. Peace is the goal of fidelity to the faith. Having received grace through faith, remain faithful to the faith. Thus you will preserve grace as always present. With its help, advancing in holiness, you will attain the peaceful ordering of the heart, in which God rests. This is the sweet end of the labors of a life pleasing to God.
The One who grants grace is preeminently God the Father. The peacemaker is God the Son in the Holy Spirit. Therefore it is said: from God our Father and the Lord Jesus Christ.
Blessed Jerome writes: "Either both things belong to both together, that is, grace and peace belong both to God the Father and to our Lord Jesus Christ. Or one must be assigned to one, and the other to the other: grace to God the Father, and peace to the Lord Jesus Christ. A little below it is said: 'to the praise of the glory of His grace, by which He has graced us in the Beloved' (6). The Father's grace consists in this, that He was pleased to send His Son for our salvation. The Son's peace consists in this, that through Him we have been reconciled to God the Father."
Saint Chrysostom says: "He said 'grace,' and he calls God Father, for this name is the sign of that grace. How so? Listen to what he says elsewhere: 'Because you are sons, God has sent the Spirit of His Son into your hearts, crying: Abba, Father!' (Gal 4:6)."
Blessed Theophylact sets forth the same thought more fully: "Having said 'grace,' he adds 'from God our Father,' to show what grace has done for us. It has made the Master and God our Father. But the Lord, that is, God the Son, by grace toward us, became both Jesus and Christ. For, having been incarnate for our sake, He received the name Jesus and anointed humanity with the Godhead."
To believers is given the authority to become children of God, because, having received the Lord, they are born of God. They do not merely bear the name of sons, but are sons in reality (Jn 1:12-13). The Spirit of God, who accomplishes this, also implants the feeling of sonship. By it the truly regenerated man calls God Father with the same disposition as a natural son calls his natural father.
Jesus Christ is Lord not only of us Christians, but of the whole world. As Mediator and Redeemer, all things have been given to Him by the Father. All authority in heaven and on earth has been given to Him (Mt 28:18). He will manifest this authority until the whole plan of the divine economy of our salvation is perfectly fulfilled. Then He will deliver His Kingdom to God and the Father (1 Cor 15:24), and God will be all in all.