When it is a clear day, the sunlight enters my room and bounces around the white walls to wake me up. We never 'paint' walls white in Japan. This experience makes me aware of the existence and the power of light itself. When a direct sunbeam enters through a window, it often yields a small prism. When a car passes at night, the motion of light causes the texture of the window glass to project on the wall.
Traces appear in the room, then disappear.
This is when something shifts awareness within an instant, as if suspended in a daydream. This moment can occur before any mundane object we see or before another's face. A voice or sound, or the smell of a fragrance can also set these sensations in motion. The memory of past moments of joy leads us on. The responses of happiness and joy are our first concern.