"Now may the God of peace himself sanctify you completely, and may your whole spirit and soul and body be kept blameless at the coming of our Lord Jesus Christ. He who calls you is faithful; he will surely do it." (1 Thessalonians 5:23-24 ESV)
“Sanctification may be defined as that gracious and continuous operation of the Holy Spirit by which He purifies the sinner from the pollution of sin, renews his whole nature in the image of God, and enables him to perform good works.” (Louis Berkhof, Manual of Christian Doctrine, p 267)
Here's the responsive reading after the sermon:
Leader: Blessed is the one whose transgression is forgiven,
whose sin is covered.
Blessed is the man against whom the LORD counts no iniquity,
and in whose spirit there is no deceit.
Congregation: I acknowledged my sin to you,
and I did not cover my iniquity;
I said, "I will confess my transgressions to the LORD,"
and you forgave the iniquity of my sin.
Leader: Let everyone who is godly offer prayer to you
at a time when you may be found.
Many are the sorrows of the wicked,
but steadfast love surrounds the one who trusts in the LORD.
Congregation: Hide your face from my sins, and blot out all my iniquities.
Create in me a clean heart, O God, and renew a right spirit within me.
Leader: The sacrifices of God are a broken spirit;
a broken and contrite heart, O God, you will not despise.
Congregation: If you, O LORD, should mark iniquities,
O Lord, who could stand?
But with you there is forgiveness,
that you may be feared.
Leader: In Christ we have redemption through his blood,
the forgiveness of our trespasses,
according to the riches of his grace,
which he lavished upon us.
Congregation: He has delivered us from the domain of darkness
and transferred us to the kingdom of his beloved Son,
in whom we have redemption, the forgiveness of sins.
Leader: When Christ had offered for all time a single sacrifice for sins,
he sat down at the right hand of God,
Congregation: For by a single offering he has perfected for all time
those who are being sanctified.
Leader: If we walk in the light, as he is in the light,
we have fellowship with one another,
and the blood of Jesus his Son cleanses us from all sin.
Congregation: If we confess our sins,
he is faithful and just to forgive us our sins
and to cleanse us from all unrighteousness.
~Readings taken from Psalm 32, 38; 51; 130; Ephesians 1; Colossians 1; Hebrews 10; 1 John 1.
Sunday's sermon in MP3 and notes in PDF at SermonAudio.