What is the difference between Justification and Sanctification?
Put simply, Justification has to do with Jesus and the 2nd Article of the Creed and Sanctification is concerned with the Holy Spirit and the 3rd Article.
Justification is being set right in our relationship with God. It has to do with Jesus and Salvation. In short, Jesus was crucified, died, was buried and rose again so that we could share in his victory over sin, death, and the power of the devil. "For by grace we are saved through faith. It is a gift of God, not by works, so no one could boast." (Ephesians 2:8-9) Therefore, Justification is God's work, not ours.
Sanctification is being made “holy,” hallowed, other, put out of the world. It’s the work of the Holy Spirit and participating in God’s presence in the world. It is “faith active in love” said Martin Luther. Sanctification is living counter to the world’s values. According to the “Affirmation of Baptism”
To proclaim the good news of God in Christ through Word and deed,
To serve all people, following the example of Jesus,
And to strive for justice and peace in all the earth.