The Holy Spirit, part of the Triune God Himself, lives in the hearts of each person who believes the Gospel of Jesus Christ.
Billy Graham explained the relationship of the Trinity as this, “The Father is the source of all blessing, and the Son is the channel of all blessing. It is through the Holy Spirit at work in us that all truth becomes living and operative in our lives.”
Read 5 things the Bible says about the Holy Spirit
But the Helper, the Holy Spirit, whom the Father will send in my name, he will teach you all things and bring to your remembrance all that I have said to you.
Where shall I go from your Spirit? Or where shall I flee from your presence?If I ascend to heaven, you are there!If I make my bed in Sheol, you are there!
But, as it is written, “What no eye has seen, nor ear heard, nor the heart of man imagined, what God has prepared for those who love him”—these things God has revealed to us through the Spirit. For the Spirit searches everything, even the depths of God.
1 Corinthians 2:9-10
Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words.And he who searches hearts knows what is the mind of the Spirit, because the Spirit intercedes for the saints according to the will of God.
I still have many things to say to you, but you cannot bear them now. When the Spirit of truth comes, he will guide you into all the truth, for he will not speak on his own authority, but whatever he hears he will speak, and he will declare to you the things that are to come. He will glorify me, for he will take what is mine and declare it to you. All that the Father has is mine; therefore I said that he will take what is mine and declare it to you.
Not only that, but we rejoice in our sufferings, knowing that suffering produces endurance,and endurance produces character, and character produces hope,and hope does not put us to shame, because God’s love has been poured into our hearts through the Holy Spirit who has been given to us.