Have you received the Holy Spirit (been born again)? If so, then you have been given power to witness and been sent into all the world to share the gospel.
“If a person is filled with the Holy Spirit, his witness will not be optional or mandatory—it will be inevitable.” Richard Halverson
Acts 1:8 “But you shall receive power when the Holy Spirit has come upon you; and you shall be witnesses to Me in Jerusalem, and in all Judea and Samaria, and to the end of the earth.”
Ray Comfort's Daily Evidence 