3 Ironical in one line. As regards the wiseacres.

Serious attitude towards yourself is not serious.

Cautious thoughts create pedants.

A person so is afraid to be mistaken that he aims to allow himself only one customary.

Originality in everything – the middle stage of idiocy.

The basis of so-called "the skill to live" is unwillingness to identify own best qualities.

When a person is busy with himself, he has no time to think about himself.

History of mankind differs from history of a person only in bigger duration.

Any performed doesn't reach perfection.