"Just as iron which is not used grows rusty, and water putrefies and freezes in the cold, so the mind of which no use is made is spoilt."

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... mortification is basic to the act of photographing. The person is mobile, ... then I freeze one moment in his movement, a mere five-hundredth of a second of that person's life-time. That's a very meager or small extract from a life.

— August Sander