A man was climbing up a high cliff, and was almost to the top when he heard a noise that sounded like a snake. He thought, should I climb to the top and get bite by the snake and die, or should I just let go and fall to my death?
Back then they didn’t have the stuff that they have now for climbing, he was just using his hands and feet to climb up the Mt. top.
After a few minutes he decided to take his chance with the snake. When he reached the top he didn’t see the snake, but he did see the wind blowing a bush, and that was what was making a noise like a hissing snake. The point is when you don’t know for sure about something, hang on, it may be only a bush making a noise, not a snake.