In the last analysis, you cannot pontificate but only point. A Christian is one who points at Christ and says, "I can't prove a thing, but there is something about His eyes and voice. There's something about the way He carries His head, His hands, the way He carries His cross - the way He carries me."
Your testimony is your testimony. People can question or challenge or even dismiss your testimony. But none of that changes the fact of what Christ has done in Your life.
So be a pointer - point to Jesus. Tell others how Jesus picked you up and began carrying you in your baptism. Tell how He saved you and changed your life with the washing of water and the Word. Tell what He continues to carry you each day of your life - how His forgiveness picks you up when you are down...how His peace lifts you up and enables you to live each day with joy in spite of tough circumstances. Tell how He has promised to carry you into eternity.
You and I can't change or convert a person. But the Holy Spirit can do this work through the Gospel. It's not our job to persuade. But we can point. Be a pointer. Point people to Jesus.
Above quote from Fredrick Bueckner, "Wishful Thinking: A Theological ABC
