There was an old tree trunk near the road. The robber who was sneaking on the road in the middle of the night was really frightened by seeing it: He thought it was the guard who wanted to arrest him.
When a young man who was in love saw that tree trunk his heart started to bump: to him it seamed like his lover was waiting there.
The child who had heard so many horror stories started to cry when he saw that tree trunk: He thought it was the bogeyman who hunts him.
But the tree was just a tree. We see the world the way what we are inside.