Almighty God, Father of our Lord Jesus Christ,
grant, we pray, that we might be grounded
and settled in your truth
by the coming of your Holy Spirit in our hearts.
What we do not know, reveal to us;
what is lacking within us, make complete;
what we do know, confirm in us;
and keep us blameless in your service,
through Jesus Christ our Lord.
Source: Clement of Rome (c. 90)
Source of this version: http://christianicon.tumblr.com/post/37974365991/almighty-god-father-of-our-lord-jesus-christ
Also found here: The One Year Book of Personal Prayer, © 1991 Tyndale House Publishers (June 10)