We forget we are called to be witnesses to what we have seen and know, not to what we don't know. The keys is authenticity and obedience, not a Doctorate in Theology. Our humanity is not our problem in evangelism the most human of all human beings had no difficulty with who he is. Jesus came to us as the first whole person since Adam and Eve before the fall. It is Jesus, then, who provides for us the model of what it means to be human. By following his lead we will not only become more like God himself but we will find ourselves becoming more comfortable with our humanity and evangelism, which will begin to flow from who we are. John 17:18 As you sent me into the world, I have sent them into the world. John 1:14 The word became flesh (He became one of us). John 4:7 When a samaritan woman came to draw water, Jesus said to her, "Will you give me a drink?" He wasn't afraid to show this physical need for a drink of water. The Garden of Gethsemane Mark 14:32-52 He didn't fear losing his testimony by revealing to his disciples the depths of his emotional distress in the Garden. He is our model of genuine godliness. If we truly believe in Him we would want to genuinely be more like Him. If that is our hope then we would take the example that He set, it's not all about being supernatural all the time. We are called to be witnesses of Him, how are we living, what little things are we doing that we think mean nothing. There is nothing here on this earth that you have went through or will go through, that He doesn't know how you feel and the pain. Evangelism is in us and while not all of us will be on the pulpit, or traveling and speaking, we all are called to be a witness in this world to all people. Take all those opportunities given to you to pray and talk with people. Being a witness lots of the time is at your job, how you work and carry yourself before your co-workers, that will make them know and wonder, I want what she has.