This is a subsidiary post of The Holy Spirit.
Related post: Holiness
The very name “Holy Spirit” makes clear and emphatic the connection between the Holy Spirit and holiness. The Holy Spirit advances holiness.
Remember also that the underlying Greek (New Testament) and Hebrew (Old Testament) words come out in English as holy, holiness, saint, sanctify, and so on.
Romans 1:4 – “the Spirit of holiness”
Romans 15:16 – “sanctified by the Holy Spirit”
2 Thessalonians 2:13 – “sanctification by the Spirit”
1 Peter 1:2 – “the sanctifying work of the Spirit”