Why should you practice witnessing and be ready to answer questions about your faith?

Les teaches that believers should be prepared because people may ask out of the blue, "Why do you believe?" or "Why this, or why that?" His practical method is to keep witnessing simple: get a piece of typewriter paper or computer paper and draw the key things freehand, even as a caricature. It does not have to be fancy or perfectly accurate; it just needs to be recognizable and usable. He tells his listeners to practice on their wife or on somebody else so they can be ready with answers. If a chance comes to witness in your home at your kitchen table, use that opportunity and draw these things out.