The Holy Ghost is the third member of the Godhead. You can read more about Him and His role here, in one of my previous posts. In the Church of Jesus Christ, when one is baptized, he or she receives the gift of the Holy Ghost. There is a difference, however, between the gift of the Holy Ghost and the power of the Holy Ghost.
The Holy Ghost can descend upon anyone, guiding him or her in whatever way God wants. There’s a simple anology that can be made. The power of the Holy Ghost is like a bolt of lightning. You can imagine life as a journey through a dark forest. Everything is black; nothing can be seen. Just as lightning may strike, illuminating the path for a second, the Holy Ghost may dwell for a moment and give needed guidance to continue onward.
Receiving the gift of the Holy Ghost is like receiving a flashlight. It’s constantly with us, lighting the trail every second of the way, so long as we are worthy of it.
We can see instances of this in the scriptures.
Now when the apostles which were at Jerusalem heard that Samaria had received the wordof God, they sent unto them Peter and John:
Who, when they were come down, prayed for them, that they might receive the Holy Ghost:
(For as yet he was fallen upon none of them: only they were baptized in the name of the Lord Jesus.)
Then laid they their hands on them, and they received the Holy Ghost. (Acts 8:14-17)
When they heard this, they were baptized in the name of the Lord Jesus.
And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied. (Acts 19:5-6)
I know that only through the complete authority, found only in The Church of Jesus Christ of Latter-day Saints, can one be endowed with the gift of the Holy Ghost, and that said gift is needed to enter into the kingdom of God.
Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. (John 3:5)