These can really be great conversation starters. Especially if you get out of your vehicle with full medieval armor and speak with an old english accent. Better yet, just get out and don’t speak. Just stare. You’re bound to get attention and someone will likely ask you what your up to. They will probably be armed as well, though, and probably have badges, guns, and mace.
I would probably just put the sticker on your vehicle, bike, gym bag, refrigerator, or wherever and then live your life straight out for Jesus. If you do, people will probably still notice. They may ask you about the sticker – but even better, they will ask you why you act the way you do, why you have peace in hard situations, and joy during difficult circumstances. Then you can share Jesus.
You go, Mighty Warrior.