A day without sunshine is like, you know, night.
Steve Martin
It's so much darker when a light goes out than it would have been if it had never shone.
John Steinbeck
Look at light and admire its beauty. Close your eyes, and then look again: what you saw is no longer there; and what you will see later is not yet.
Leonardo da Vinci
Light makes photography. Embrace light. Admire it. Love it. But above all, know light. Know it for all you are worth, and you will know the key to photography.
George Eastman