no one can lay any foundation other than the one that has been laid.
That foundation is Jesus Christ.
We admit that we have not been able to finish building on this foundation
in such a way that we may become the dwelling place of God.
We have sometimes even been the cause of its ruin.
Even if our work should be lost,
save us, Lord and give us a fresh chance to work for unity.
Create in us an ardent longing for the unity of your church
and enable us to work towards it. Amen.
~ from resources by the Pontifical Council for Promoting Christian Unity. Posted on http://www.vatican.va/roman_curia/pontifical_councils/chrstuni/weeks-prayer-doc/rc_pc_chrstuni_doc_20040701_week-prayer-2005_en.html