One man asked Socrates:

- You know what I said about you is your friend?
- Wait, - stopped him Socrates - ask first what is going to say, three screens.
- Three sieves?
- Before you say anything, you need to sift through it three times. First through a screen of truth. Are you sure that this is true?
- No, I just heard it.
- So, you do not know it's true or not. Then proseem through a second screen - a screen goodness. Do you want to say about my friend something good?
- No, on the contrary.
 
- So, - Socrates continued, - are you going to say about it is something bad, but not even sure that's true. Let's try the third sieve - use a sieve. Is it really necessary for me to hear what you want to tell?
- No, this is not necessary.
- So, - concluded Socrates, - that you want to say, there is no truth, nor goodness, nor good. Why then talk about?