A young disciple of a philosopher came to his house and told him

-Master, a friend of yours was talking about you with malevolence
-Wait! - He interrupted the philosopher
-You already made pass through the three bars what you are going to tell me?
-The three bars?
-Yes, the first is the fence of truth. Are you sure that what you want to tell me is absolutely true?
-No, I heard him comment to some neighbors.
-Then at least you have made it through the second grid, which is goodness. What do you want to tell me Is it good for someone?
-No, not really. Unlike...
-Well! - The last grate is the need. Is it necessary to let me know that you are so worried about?
-To tell the truth, no
-"Then," said the wise man, smiling, "if it is not true, neither good nor necessary, let us bury it in oblivion.