Any idiot can face a crisis - it's day to day living that wears you out.
To judge between good or bad, between successful and unsuccessful would take the eye of a God.
The wealthy are always surrounded by hangers-on; science and art are as well.
The more refined one is, the more unhappy.
Knowledge is of no value unless you put it into practice.
A good upbringing means not that you won't spill sauce on the tablecloth, but that you won't notice it when someone else does.