What does the Bible say about purification and sanctification?

In Scripture, purification and sanctification are seen as the work of God through Christ. In John 11, the Jews sought to purify themselves outwardly through tradition, but true purification comes from faith in Christ, the Lamb of God. Hebrews 9:13-14 connects the cleansing work of animals under the Old Covenant to the more profound and perfect cleansing achieved by Christ's blood, which purges the conscience to serve the living God. This ongoing work involves the Holy Spirit continually bringing believers to Christ for renewal and sanctification.