He that knows not what the world is, knows not where he is himself.

Related:

• The happiness and unhappiness of the rational, social animal depends not on what he feels but on what he does;
  just as his virtue and vice consist not in feeling...
• How much time he gains who does not look to see what his neighbour says or does or thinks,
  but only at what he does himself, to make it just and...
• A man is accepte into a church for what he believes and he is turned out for what he knows.
  Mark...
• It's hard to argue with someone who knows what he's
  talking about...
• The whole world steps aside for the man who knows where
  he is going...
• He who knows not and knows that he knows not is ignorant.
  Teach him. He who knows not and knows not that he knows...
• No man knows of what stuff he is made until prosperity and ease try him.
  A.P....
• The most important thing in a man is not what he knows,
  but what he is. -- Narciso...
• No one knows what he can do till he tries. -- Publius Syrus (42 BC) -
  Maxim...