The Scriptural revelation concerning the attributes of the Holy Spirit points unmistakably to the conclusion that the Holy Spirit possesses full deity. This can be demonstrated in at least seven particulars.
(1) The Holy Spirit is revealed as possessing life (Romans 8.2). The context indicates that spiritual or eternal life is in view which, originally, was the possession of God alone, and is now bestowed on some of His creatures through regeneration.
(2) The attribute of personality has abundant witness, as already demonstrated.
(3) The Holy Spirit is omnipresent (Psalm 139.7), an attribute only God may possess.
(4) Omniscience belongs to the Holy Spirit (1 Corinthians 2.10-11), and
(5) Omnipotence, as illustrated in His work of creation (Genesis 1.2).
(6) Holiness is frequently assigned to the One who is distinctively known as the Holy Spirit (Luke 11.13).
(7) The eternity of the Spirit is revealed also in Scripture (Hebrews 9.14).
The nature of the attributes is such that they could not all be communicated to a creature. From the explicit revelation of the attributes of the Holy Spirit, it may be concluded that His deity is fully sustained in Scripture.
From: The Holy Spirit: A Comprehensive Study of the Person and Work of the Holy Spirit by John F. Walvoord (Grand Rapids: Zondervan Publishing House, 1965), pp. 16-17. First published in 1954.