One of the most prominent themes in James is human speech. While James mentioned the importance of controlling our tongues in James 1:19 and 1:26, he dedicated most of James 3 to the power of speech for good or for evil. He also pointed us to the help we need to harness our speech for good.
"Death and life are in the power of the tongue, and those who love it will eat its fruits."
Christians need to walk wisely by being filled in the Holy Spirit.
After God used Philip to save many Samaritans, he sent him to evangelize one who had come from the ends of the Earth.