John 20:21 So Jesus said to them again, “Peace to you! As the Father has sent Me, I also send you.”
One of the first things Christ did on His resurrection was to set in place a way we should spread the Gospel.
Our commission is the same as Jesus laid out to the disciples; to take the truth of what has happened and to tell other people about it.
The Holy Spirit is the one who will work on their hearts to change their spirits; our job is to simply tell people the truth from our hearts.
People will be more willing to believe someone who knows they are telling the truth…