The Apostle Paul spoke of the triune nature of the Holy Spirit:

For the law of the Spirit of life in Christ Jesus hath made me free from the

law of sin and death.

For what the law could not do, in that it was weak through the flesh, God

sending His own Son, in the likeness of sinful flesh, and for sin, condemned

sin in the flesh. (Romans 8:2-3)

The grace of the Lord Jesus Christ, and the love of God, and the communion

of the Holy Ghost, be with you all. (II Corinthians 13:14)

For through Him [the Son] we both have access by one Spirit unto the

Father. (Ephesians 2:18)

The Apostle Peter also spoke of the triune nature of God:

If ye be reproached for the name of Christ, happy are ye; for the Spirit of

glory and of God resteth upon you: on their part He is evil spoken of, but on

your part He is glorified. (I Peter 4:14)

The book of Acts also verifies the triune nature of God:

Therefore being by the right hand of God exalted, and having received of the

Father the promise of the Holy Ghost, He hath shed forth this, which ye now

see and hear. (Acts 2:33)

The following diagram illustrates the triune nature of God. There are three personalities...God
the Father, Jesus Christ the Son, and the Holy Spirit...yet they are one God:

Holy Spirit  Son

Father