2 But what can I do, I who can only wish for peace and have no power to bring it about? Even though the wish may win its recompense with God, its futility must still sadden him who cherishes it. When the apostle said, “as much as lies in you, live peaceably with all men,” he knew quite well that the realisation of peace depends upon the consent of two parties. The prophet truly cries “They say Peace, peace: and yet there is no peace.” To overthrow peace by actions while professing it in words is not hard.
To point out its advantages is one thing and to strive for it another. Men's speeches may be all for unity but their actions may enforce bondage. I wish for peace as much as others; and not only do I wish for it, I ask for it. But the peace which I want is the peace of Christ; a true peace, a peace without rancour, a peace which does not involve war, a peace which will not reduce opponents but will unite friends. How can I term domination peace? I must call things by their right names.
Where there is hatred there let men talk of feuds; and where there is mutual esteem, there only let peace be spoken of. For my part I neither rend the church nor separate myself from the communion of the fathers. From my very cradle, I may say, I have been reared on Catholic milk; and no one can be a better churchman than one who has never been a heretic. But I know nothing of a peace that is without love or of a communion that is without peace. In the gospel I read:— “if you bring your gift to the altar and there rememberest that your brother has anything against you; leave there your gift before the altar and go your way; first be reconciled to your brother, and then come and offer your gift.” If then we may not offer gifts that are our own unless we are at peace with our brothers; how much less can we receive the body of Christ if we cherish enmity in our hearts?
How can I conscientiously approach Christ's eucharist and answer the Amen if I doubt the charity of him who ministers it?
Source: Letters (New Advent)