The Holy Spirit comes upon you to influence you. That is to cause you to do the will of God. He comes upon your life so you become the witness of what God has done in your life.
The Holy spirit gives you the power and boldness to preach about Jesus. You were saved for others to be saved. Moreover, When you cultivate a life of gratitude you will see how much God loves you. As a result you will want to share the love of God; share what God has done.
The Samaritan woman reached others by telling them what Jesus Christ has done in her life. Therefore, your testimony can change someone's life. Like Jesus Christ who was filled with the Holy Spirit and went around doing good, you must allow the HOLY SPIRIT to influence you so that you can influence others