Prayers for the unity of Christians

Lord, hear the prayer of Your people and bring the hearts of believers together in Your praise and in common sorrow for their sins. Heal all divisions among Christians that we may rejoice in the perfect unity of Your Church, and move together as one to eternal live in Your Kingdom.

Roman Missal

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O Lord Jesus Christ, Who, for the salvation of mankind, didst establish the Catholic, Apostolic and Roman Church, and didst command Her to preach Thy Gospel and to baptise and covert all nations; look with clemency on those who, whether knowingly or unknowingly, art separated from the same Roman Church, and art in schism from the Roman Pontiff, Thy Vicar and Representative on earth, and who art in heresy concerning the doctrines of Thy Faith. Hear the prayers of Thy faithful servants who, out of love for Thee, profess all the doctrines of the Catholic and Roman Faith, and who submit their wills and intellects to the Sacred Magisterium of the Church, knowing that She alone possesseth the whole truth; convert Thou those who profess faith in Thee, but who art outside the Barque of Peter, and grant them ease of convertion and joy at the enlightening of their minds concerning the Deposit of Faith which Thou didst commit to the care of the holy Apostles. Be Thou to all heretics and schismatics a merciful Shepherd, and with Thy crook and staff guide all these lost sheep to the One Fold of the Church. Amen

O Most Holy Mary, who alone has destroyed every heresy in the whole world, intercede for all heretics and schismatics, and convert them to the Church of Thy Son, and to the profession of the Catholic Faith, which thou also didst profess. Be thou the sure bridge to the Catholic Faith upon which the heretic and the schismatic may safely journey across. Amen

Composed by St. Mark