‘Dual face’

I am always afraid of those people who has dual face i.e. they will act something in front of you and suddenly change behind you. My question is that why they behave like this ? I think it is only because either they don’t have courage to speak the truth or they have something benefits from you. So if they are the first one leave them on their own fate but if they are in second list you have to take some action because they become bitter ones, once their need has been completed. Let’s throw them out the list of loving ones.

Love your life and live your life.