31 To you, therefore, God the Father Almighty, God the Son who have redeemed the world, God the Spirit who are the sustainer and teacher of all holiness, I desire to entrust the whole Church of yesterday, today and tomorrow, the Church both in Europe and throughout the earth. Into your hands I commit this singular wealth, made up of so many different gifts, ancient and new, placed in the common treasury by so many different sons and daughters. The whole Church thanks you, who called the Slav nations into the communion of the faith, for this heritage and for the contribution made by them to the universal patrimony. The Pope of Slav origin in a special way thanks you for this. May this contribution never cease to enrich the Church, the Continent of Europe and the whole world! May it never fail in Europe and in the world of today! May it never fade from the memories of our contemporaries! We desire to accept in its entirety everything original and valid which the Slav nations have brought and continue to bring to the spiritual patrimony of the Church and of humanity. The whole Church, aware of this common treasure, professes her spiritual solidarity with them and reaffirms her own responsibility towards the Gospel, for the work of salvation which she is called upon to accomplish also today in the whole world, unto the ends of the earth. It is essential to go back to the past in order to understand, in the light of the past, the present reality and in order to discern tomorrow. For the mission of the Church is always oriented and directed with unfailing hope towards the future.
Source: Slavorum Apostoli (Vatican.va)