but it might be useful for serial killers who want to kill as much people as possible by going in people's dreams and killing them with the knife they hold while going to sleep.also it might be fun or boring to explore peoples dreams.
Knife could also indicate the desire to cut off something or someone. Knife may also serve the purpose of "cutting the way through", such as in going through the bush, but then, one would perhaps want to use a machete instead.
