Persuasion, cf. communication
When Benjamin Franklin wished to interest the people of Philadelphia in street lighting, he didn't try to persuade them by just talking about it. He hung a beautiful lantern on a long bracket in front of his home. He kept the glass highly polished. Every evening at the approach of dusk, he carefully lit the wick. People saw the light from a distance and when they walked in its light, found that it helped them to avoid sharp stones on the pavement. Others placed light at their homes, and soon Philadelphia recognized the need for street lighting. As others learn of the peace and joy you have in your life in Christ, they will recognize their need for Him. Your witness through personal testimony may be just what someone is waiting for!