Paul said from prison, "For I know whom I have believed, and am convinced that he is able to guard what I have entrusted to him for that day"
We had a friend who died in hospital. Shortly before he died he sat up in his bed and, with a loud voice declared, "I believe!". It was a powerful testimony to his faith in Jesus Christ.
Perhaps you are not very good at arguing with some friends who don't believe in Jesus, or who think the Bible is full of mistakes or that heaven and hell are not real... However, arguments and debates can only take you so far. But a personal testimony about what the Lord Jesus has done for you and means to you can be a really powerful way of showing what the Gospel is all about.
If you look up Galatians 2: 19-21 you find there Paul's great testimony about his faith in the Lord Jesus. In these verses Paul almost sings about what happened to him when he became a follower of Jesus — he saw that Jesus had died for him so that his sins would be forgiven. He saw that all that Jesus did for him, he did in love - "The Son of God loved me and gave himself for me." What could be greater proof than that of the reality of God's converting power?
"Love so amazing, so divine,
Demands my soul, my life, my all".
Dear Lord Jesus Christ, may my life show clearly my love for you as a reflection of your great love for me. Amen.