Near the end of the Gospel of John, just before He was crucified, Jesus told His disciples about a comforter He would send, to remind them of all the things He had taught. That comforter, the Holy Spirit of God, came at Pentecost, just a short time after Jesus ascended into heaven. In the first chapter of Acts we read about that event as His disciples were filled with His Spirit and began declaring the Gospel message.
What this means for you and me is that once we confess our sins, receive God's forgiveness and accept the gift of salvation through Christ, we can know the presence of that Comforter, too. With His Holy Spirit living in us, His nature gradually overtakes our own. As that happens, others will begin to discover where God is by knowing you.