As Christians we need the Holy Spirit. Who is the Holy Spirit ? The Holy Spirit is third Person in the Trinity (God the Father, the Son and the Holy Spirit). We receive the Holy Spirit when we believe or trust in Jesus Christ as our Lord and Savior. How do we know or trust Jesus Christ ? The Holy Spirit works through Christians and God's word the Bible to tell us about God and Jesus.
The Holy Spirit works through believers to introduce Jesus Christ to the world or to everyone. When one believes in Jesus then the Holy Spirit enters into one's heart.But first the Holy Spirit will remind us that we sinned and that we need a Savior who is Jesus Christ. Once the Holy Spirit is inside our heart, He the Holy Spirit encourages us to pray , read the Bible, and convicts us of our sins and give us God's love that will further bloom as we share that love to others. The Holy Spirit is gentle and will not force anyone.
The Holy Spirit comes as a gift from the Father and the Son. The Holy Spirit helps us in our Christian walk or life. He will guide us into all truth.