Edit (Correction): Salvation is by grace through faith, and that sanctification is through obedience to God's commandments; but that we're justified through faith in Christ.
1 Corinthians 6:11
Such were some of you; but you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus Christ and in the Spirit of our God.
Romans 15:15-16
But I have written very boldly to you on some points so as to remind you again, because of the grace that was given me from God, to be a minister of Christ Jesus to the Gentiles, ministering as a priest the gospel of God, so that my offering of the Gentiles may become acceptable, sanctified by the Holy Spirit.
1 Peter 1:1-2
Peter, an apostle of Jesus Christ, To those who reside as aliens, scattered throughout Pontus, Galatia, Cappadocia, Asia, and Bithynia, who are chosen according to the foreknowledge of God the Father, by the sanctifying work of the Spirit, to obey Jesus Christ and be sprinkled with His blood: May grace and peace be yours in the fullest measure.
2 Thessalonians 2:13
But we are bound to give thanks alway to God for you, brethren beloved of the Lord, because God hath from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth:
Hebrews 10:10
By the which will weare sanctified through the offering of the body of Jesus Christ once for all.
And any good Law 'keeper' will bring up John 17:17 -
17 Sanctify them through thy truth: thy word is truth.
. . . which makes it sound like it's the Scriptures (word) is how we are sanctified, and Law-keepers narrow that focus to Torah observance, but is that what Jesus was really saying there?
What was the Greek word for 'word' that John uses there? 'Graphe', which is the Greek for 'Scriptures?'
Or 'Logos', which is the Greek word that John uses to describe Jesus, the full expression of the Living God?
Logos is the word used there, so it is not by the Scriptures that we are sanctified, but by Christ.
Now check this out:
9 You, however, are not in the flesh but in the Spirit, if in fact the Spirit of God dwells in you. Anyone who does not have the Spirit of Christ does not belong to him. - Rom. 8
And this:
6 Jesus answered, “I am the way and the truth and the life. No one comes to the Father except through me. - Jn. 14
Guys, sanctification is not about obedience to the commandments, it's about being in Christ.
Being in Christ results in Him producing His Fruit in and through us.
The Fruit?
Love and its subsets: joy, peace, patience, kindness, goodness, faithfulness,gentleness, and self-control.
God's commands after the Cross?
Believe in the One God sent and love one another. (1 Jn. 3)
It's not about Law; it's about Belief in Christ and love.
-JGIG