“And you will be my witnesses, telling people about me everywhere – in Jerusalem, throughout Judea, in Samaria, and to the ends of the world.” (Acts 1:8, NLT)
Effective witness is supernaturally empowered. The Holy Spirit Himself makes us able, efficient and mighty as witnesses. He offers the power. We just offer the volume. Even when we think we’ve butchered a presentation, if we were sincere and God was in it, He will render it effective. Leave the results to Him. He’s the One who draws. We’ll never be so good at blowing it that we mess God up.
(Beth Moore, from Voices of the Faithful compiled by Kim P. Davis, page 146)