The Lord will use a Christian's personal testimony in powerful ways. As we speak about how God has rescued and changed us, the Holy Spirit can heighten people's interest in spiritual matters and use our words to help them seek Christ as their Savior.
In John 9, we learn about a blind man whom the Lord healed. He had been sightless since birth, and many people wanted to know about his miraculous healing. To each one who questioned him, he told the facts as he had experienced them: "The man they call Jesus made mud and spread it over my eyes and told me, 'Go to the pool of Siloam and wash yourself.' So I went and washed, and now I can see!" (John 9:11 NLT).
When we obey Jesus' commands, people around us will notice that there is something different about us. Perhaps they'll be curious about our ability to remain patient or calm in times of adversity. They may ask why we have given up popular activities or avoid certain places. We can respond as simply as the blind man did: "I was spiritually blind and separated from God by sin. Jesus, the Savior, died on the cross to pay for my sins. Through faith in Him, I know I have been forgiven and have been adopted into God's family. That's why I am not the same."
We don't have to know every answer to every question in order to talk about our Savior. We need only tell what has happened to us personally. Take the time to write out your testimony in a few sentences, and be able to relate the story briefly and clearly. Then look for an opportunity to tell someone what God has done in your life.