I wonder utterly, but an advice or a sermon

is done from the older to the younger.

It is irrational, I think.

There are many stupid youths, but there are many stupid adults at the same level.

Then I think that you may preach an adult a sermon from a youth.

However, such a thing is rarely performed.

I think about it, and it might be a correct answer of "the sermon to an adult is the same of the sermon to oneself in the future".

In opposite, "the sermon to a youth" is reliable, because time is irreversible.Sparks do not pour into oneself.

In a more unfair thing, it is convenient sermon with an escape route."You do not do the same my same failure for you."

This phrase really causes vomiting.

(To be continued)