Will saying something in anger come true?
I will say No, Everyone's Curse or Blessings is not going to be true. People who have achieved the power to curse & give blessings, their sayings will only be true.
Every Mother wants her son to be a good human or a rich man. She always give her blessings to her son, but for everyone it doesn't become true.
Every Father blesses her daughter to lead a happy life but those blessings does not become true.
Like that only, Every enemy may curse a person to die in hell, but it is not going to be true because that person has not achieved the power to do so.
In Anger, Normal People speaks what their inner conscience wants them to tell. So Sometimes the things come true because of coincidence & most of the times, it is expected outcome of a human being, because of series of past events.
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