September 17, 2021
O God, who adorned Saint Robert,
Your Bishop and Doctor,
with marvelous learning and virtue
to expose the deceptions of error
and to defend the rights of the Apostolic See,
grant by his merits and intercession,
that love for the truth may increase in us,
and the souls that do wander
may return to the unity of Your Church.
Through our Lord Jesus Christ, Your Son,
who lives and reigns with You
in the unity of the Holy Spirit,
one God, for ever and ever.