Imagine you are an unlit candle. Someone comes along and lights your wick and you begin to glow with orange light. Your flame grows stronger and your whole body becomes engulfed. Feel yourself giving off this warm light.
Your fire light is like the brightness of wisdom that is driving away the darkness of ignorance. You are the bright orange light. Feel yourself expanding, your light reaching out further and further until it fills your entire house, then even further until it fills your whole neighborhood. Your neighborhood is illuminated by your orange fire light. Imagine it traveling even further out to the entire country and still further to encompass the entire world. You are as big as the whole world and your light illuminates every space to break through any darkness. Continue glowing with this orange light in all directions.