Slip of the tongue will be very serious sometimesOur tongue is boneless. It can be twisted in any way we want. We can say something now and after some time we can say we have not said that. That will give them a chance to come out of difficulties.
But sometimes with intention or without intention, we may say some words. They may hurt the feelings of others and they may try to put us in problems. The best example for this is from Mahabharath. When Duryodhana visited Mayasabha he slipped his leg and drowned in water. At that moment Draupadi seen that and laughed at him and said, " Blind man's son is also Blind". This made Duryodhana very angry and it is the beginning of all the difficulties to Pandavas even though they won the war ultimately.
We should be careful in talking and we can't take back once we have spoken.