We may wish we could perform a miraculous act that would convince everyone once and for all that Jesus is Lord. But we see here(see below), that even if we could perform a miracle, it wouldn’t convince everyone. God gave these men(Paul and Barnabas) power to do great wonders as confirmation of the message of grace, but people were still divided. Don’t spend your time and energy wishing for miracles. Sow your seeds of the Good News on the best ground you can find in the best way you can, and leave the convincing to the Holy Spirit.
‘The same thing happened in Iconium. Paul and Barnabas went to the Jewish synogogue and preached with such power that a great number of both Jews and Greeks became believers. Some of the Jews, however, spurned God‘s message and poisoned the minds of the gentiles against Paul and Barnabas. But the apostles stayed there a long time, preaching boldly about the grace of the Lord. And the Lord proved their message was true by giving them power to do miraculous signs and wonders.’ Acts 14:1-4 NLT Life Application Study Bible