O Lord our God,
grant us grace to desire you with our whole heart,
that so desiring we may seek and find you;
and so finding you we may love you;
and loving you we may hate those sins
from which you have redeemed us;
for the sake of Jesus Christ.
Source: St. Anselm of Canterbury, d. 1109
Source: St. Anselm, eleventh century
Source of this version: Freely modified from Prayers of the Middle Ages, edited by J. Manning Potts, 1954.
A longer version of this prayer can be found here.