27 Praying for unity is not a matter reserved only to those who actually experience the lack of unity among Christians. In the deep personal dialogue which each of us must carry on with the Lord in prayer, concern for unity cannot be absent. Only in this way, in fact, will that concern fully become part of the reality of our life and of the commitments we have taken on in the Church. It was in order to reaffirm this duty that I set before the faithful of the Catholic Church a model which I consider exemplary, the model of a Trappistine Sister, Blessed Maria Gabriella of Unity , whom I beatified on 25 January 1983. Sister Maria Gabriella, called by her vocation to be apart from the world, devoted her life to meditation and prayer centered on chapter seventeen of Saint John's Gospel, and offered her life for Christian unity. This is truly the cornerstone of all prayer: the total and unconditional offering of one's life to the Father, through the Son, in the Holy Spirit. The example of Sister Maria Gabriella is instructive; it helps us to understand that there are no special times, situations or places of prayer for unity. Christ's prayer to the Father is offered as a model for everyone, always and everywhere.
Source: Ut Unum Sint (Vatican.va)