If you have seen a very sharp knife in your dream: Beware of a person who uses your information about your private life in your business environment, you should be careful against sudden changing events. To see a very sharp knife in a dream, to talk to one's sister abroad, corresponds to going to visit this person and experiencing some developments in his life. According to İhya, this dream conveys that he attaches great importance to education and to cure his brother's problems. For a married man, this dream is a sign of financial comfort instead of spending on charity.