Madness string 84008

Random mermaid
Who can believe that it is the little choices we make, every day, between good and evil, that turn the world to waste and hope to despair? But it is the case. We see our immense capacity for evil, constantly realized before us, in great things and in small – but can never seem to realize our infinite capacity for good. Who can argue with a Solzhenitsyn when he states: 'One man who stops lying can bring down a tyranny.'

What do you call pictures in your head that you can't make go away?