The Holy Spirit (sometimes called the Holy Ghost) is the third part of the Godhead (or Trinity), which is comprised of the Father, the Son (Jesus, the Christ), and the Holy Spirit.
When Jesus came to earth, the Father gave him the Holy Spirit (John 3:34).
Later, the Holy Spirit was sent to guide and direct Jesus’ followers after he ascended into heaven (Luke 24:49 and Acts 2:1-4).
Now, the Holy Spirit works to draw people to Jesus and guide those who follow him.
Key verse about Holy Spirit: The angel answered, “The Holy Spirit will come on you, and the power of the Most High will overshadow you. So the holy one to be born will be called the Son of God” (Luke 1:35, NIV).
A lifelong student of the Bible, Peter DeHaan, PhD, wrote the 1,000-page website ABibleADay.com to encourage people to explore the Bible. His main blog and many books urge Christians to push past the status quo and reconsider how they practice their faith in every area of their lives.