Of course we know what's going to happen when you switch a light on - what a ridiculous thing to say. When you flip the switch, the reasonable expectation is that the light will come on, or if not, there is a reason why. It takes absolutely zero faith to expect the light to come on instead of, say, turning into a butterfly that shits M&Ms.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'