Acts 26:15-16And I said, ‘Who are you, Lord?’ And the Lord said, ‘I am Jesus whom you are persecuting. 16 But rise and stand upon your feet, for I have appeared to you for this purpose, to appoint you as a servant and witness to the things in which you have seen me and to those in which I will appear to you,

Paul is testifying before King Agrippa as Paul has appealed to Caesar as a Roman citizen. The Jewish people were seeking to have him tried and put to death for preaching Jesus. Paul with a moment to give a legal defense does not reach into every crevice of Jewish law and regulation, but instead looks to where the gospel intersected his life, he shares his story. 
I should never forget the power of my testimony. Once I was dead in sin but Jesus has brought me life! There’s no argument or explanation that could bring someone to faith, but the power of testimony has compelled many. 
Lord teach me more and more to live a life that testifies to your gospel work in me. Open my eyes to opportunities this week and even today to be sharing your story in my life with someone.