There are few things more exciting to witness than a new Christian who is enthusiastic about their faith. They suck in Bible teaching like a Shop Vac.
You are his living testament
"God is pursuing with omnipotent passion a worldwide purpose of gathering joyful worshipers for Himself from every tribe and tongue and people and nation. He has an inexhaustible enthusiasm for the supremacy of His name among the nations. Therefore, let us bring our affections into line with His, and, for the sake of His name, let us renounce the quest for worldly comforts and join His global purpose." – John Piper