"The pictures are out there: You just have to see them." What does my credo mean in practice? Maybe you are walking around in a city. Suddenly you see a scene that attracts your attraction, and you think: This would be a nice picture. – You have to take the picture now, immediately giving up what you are doing. Because what you see may be gone in a few seconds, because human beings are involved, or because it's the light that makes this scene extraordinary.
But even if I miss the picture I saw a few minutes ago, what matters is that my brain has switched on to photography: I am completely focussed on the visual world. Often what I see next is even better than what attracted my attention in the first place. This state of mind is absorbing, because I have to make a few decision quickly for each picture i am taking with my camera. If I neglect to control the capturing carefully, the picture is lost. To name the maybe most annoying lack: Either the image is on focus – or it is not.