Galatians 5:1-6 (NKJV)
1 Stand fast therefore in the liberty by which Christ has made us free, and do not be entangled again with a yoke of bondage.
2 Indeed I, Paul, say to you that if you become circumcised, Christ will profit you nothing.
3 And I testify again to every man who becomes circumcised that he is a debtor to keep the whole law.
4 You have become estranged from Christ, you who attempt to be justified by law; you have fallen from grace.
5 For we through the Spirit eagerly wait for the hope of righteousness by faith.
6 For in Christ Jesus neither circumcision nor uncircumcision avails anything, but faith working through love.
2 Corinthians 3:17 (NIV)
17 Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom.